| Get Him Back for Christmas | 2024 | Actress | Bella |
| Mr. Manhattan | 2024 | Actress | Dani |
| The Casagrandes Movie | 2024 | Actress | Carlota Casagrande (voice) |
| Never Too Late to Celebrate | 2023 | Actress | Camila |
| The Loud House | 2017–2023 | Actress | Carlota |
| A Paris Proposal | 2023 | Actress | Anna Bowman |
| The Casagrandes | 2019–2022 | Actress | Carlota |
| Love in the Limelight | 2022 | Actress | Summer Rivera |
| Taking a Shot at Love | 2021 | Actress | Jenna |
| Picture Perfect Mysteries: Exit, Stage Death | 2020 | Actress | Allie Adams |
| Mighty Oak | 2020 | Actress | Valerie Scoggins |
| Picture Perfect Mysteries: Dead Over Diamonds | 2020 | Actress | Allie Adams |
| The Power Couple | 2019 | Actress | Gaby Powers |
| Picture Perfect Mysteries: Newlywed and Dead | 2019 | Actress | Allie Adams |
| Christmas Made to Order | 2018 | Actress | Gretchen |
| Sleep Away | 2018 | Actress | Isabella |
| Love at Sea | 2018 | Actress | Olivia Grayham |
| Enchanted Christmas | 2017 | Actress | Laura Trudeau |
| Hapbee Company: Board Meeting Commercial | 2017 | Actress | |
| Destination Wedding | 2017 | Actress | Ellie Hamilton |
| Clorox Wipes: LexLos Commercial | 2017 | Actress | Mom |
| Carlos PenaVega: Bésame | 2017 | Actress | Wife |
| Coca Cola: Carlos and Alexa PenaVega Commercial | 2016 | Actress | |
| Ms. Matched | 2016 | Actress | Libby Boland |
| Muertoons | 2014–2015 | Actress | Rosita (voice) |
| The Murder Pact | 2015 | Actress | Camille |
| Pixies | 2015 | Actress | Michelle Meyers (voice, as Alexa Vega) |
| Roommate Wanted | 2015 | Actress | Janie (as Alexa Vega) |
| Nashville | 2014–2015 | Actress | Kiley Brenner |
| Do You Believe? | 2015 | Actress | Lacey |
| The Mentalist | 2015 | Actress | Lily Stoppard |
| Spare Parts | 2015 | Actress | Karla |
| 23 Blast | 2014 | Actress | Ashley (as Alexa Vega) |
| The Remaining | 2014 | Actress | Skylar (as Alexa Vega) |
| Dorothy Ice Bucket Fail | 2014 | Actress | Dorothy Gale |
| Sin City: A Dame to Kill For | 2014 | Actress | Gilda (as Alexa Vega) |
| Courtside TV Series | 2014 | Actress | Alexa |
| The Tomorrow People | 2014 | Actress | Hillary Cole (as Alexa Vega) |
| Code Academy | 2014 | Actress | Libby |
| Wicked Blood | 2014 | Actress | Amber Dawn Baker (as Alexa Vega) |
| The Clockwork Girl | 2014 | Actress | Tesla (voice, as Alexa Vega) |
| The Hunters | 2013 | Actress | Dylan Savini (as Alexa Vega) |
| Adrian Vera: He Don't Know - Remix Music Video | 2013 | Actress | Woman |
| Machete Kills | 2013 | Actress | KillJoy (as Alexa Vega) |
| Big Time Rush | 2013 | Actress | Alexa Vega |
| Bounty Killer | 2013 | Actress | Stewardess (as Alexa Vega) |
| The Mine | 2012 | Actress | Sharon (as Alexa Vega) |
| Aerosmith: Legendary Child | 2012 | Actress | Girl on Roller Skates |
| Royal Pains | 2012 | Actress | Hollister (as Alexa Vega) |
| The Devil's Carnival | 2012 | Actress | Wick (as Alexa Vega) |
| Unsupervised | 2012 | Actress | Christina (voice, as Alexa Vega) |
| The Pregnancy Project | 2012 | Actress | Gaby Rodriguez (as Alexa Vega) |
| Summer Song | 2011 | Actress | Ellie (as Alexa Vega) |
| Café | 2011 | Actress | Sally (as Alexa Vega) |
| Spy Kids 4: All the Time in the World | 2011 | Actress | Carmen Cortez (as Alexa Vega) |
| From Prada to Nada | 2011 | Actress | Mary Dominguez (as Alexa Vega) |
| Mother's Day | 2010 | Actress | Jenna - Party Girl (as Alexa Vega) |
| The Middle | 2010 | Actress | Morgan Edwards (as Alexa Vega) |
| Innocent | 2010 | Actress | Ashley (as Alexa Vega) |
| Alexa Vega: Christmas Is the Time to Say I Love You Music Video | 2009 | Actress | Alexa Vega |
| Ruby & the Rockits | 2009 | Actress | Ruby Gallagher (as Alexa Vega) |
| Broken Hill | 2009 | Actress | Kat Rogers (as Alexa Vega) |
| Alexa Vega: You Are Where I Live | 2009 | Actress | Alexa Vega |
| Ghost Whisperer | 2009 | Actress | Serena Westen (as Alexa Vega) |
| The Blue Elephant 2 | 2009 | Actress | Melody (voice) |
| Repo! The Genetic Opera | 2008 | Actress | Shilo Wallace (as Alexa Vega) |
| Remember the Daze | 2007 | Actress | Holly (as Alexa Vega) |
| Marrying God | 2006 | Actress | Ivy (as Alexa Vega) |
| Walkout | 2006 | Actress | Paula Crisostomo (as Alexa Vega) |
| Odd Girl Out | 2005 | Actress | Vanessa (as Alexa Vega) |
| State's Evidence | 2004 | Actress | Sandy (as Alexa Vega) |
| Sleepover | 2004 | Actress | Julie (as Alexa Vega) |
| Spy Kids 3-D: Game Over - The Video Game | 2003 | Actress | Carmen Cortez (voice) |
| Spy Kids 3: Game Over | 2003 | Actress | Carmen Cortez (as Alexa Vega) |
| The Bernie Mac Show | 2003 | Actress | Jill (as Alexa Vega) |
| All That | 2002 | Actress | Spy Kids (as Alexa Vega) |
| Alexa Vega: Isle of Dreams | 2002 | Actress | Carmen Cortez |
| Spy Kids 2: Island of Lost Dreams | 2002 | Actress | Carmen Cortez (as Alexa Vega) |
| Spy Kids: Mega Mission Zone | 2002 | Actress | Carmen Cortez |
| Ladies Man | 1999–2001 | Actress | Wendy Stiles (as Alexa Vega) |
| Follow the Stars Home | 2001 | Actress | Amy Williams (as Alexa Vega) |
| Spy Kids | 2001 | Actress | Carmen Cortez (as Alexa Vega) |
| Run the Wild Fields | 2000 | Actress | Opal 'Pug' Miller (as Alexa Vega) |
| The Deep End of the Ocean | 1999 | Actress | Kerry (age 9) (as Alexa Vega) |
| NetForce | 1999 | Actress | Susan 'Susie' Michaels (as Alexa Vega) |
| To Have & to Hold | 1998 | Actress | Kelly McGrail (as Alexa Vega) |
| Dennis the Menace Strikes Again! | 1998 | Actress | Gina (as Alexa Vega) |
| The Magnificent Seven | 1998 | Actress | Olivia Greer (as Alexa Vega) |
| Life's Work | 1996–1997 | Actress | Tess Hunter (as Alexa Vega) |
| Ghosts of Mississippi | 1996 | Actress | Claire DeLaughter (as Alexa Vega) |
| The Glimmer Man | 1996 | Actress | Cole's Daughter (as Alexa Vega) |
| Shattered Mind | 1996 | Actress | Rosie (as Alexa Vega) |
| Twister | 1996 | Actress | Jo Harding age 6 (as Alexa Vega) |
| McDonald's: Happy Meal 1996 Commercial Short | 1996 | Actress | |
| High Incident | 1996 | Actress | (as Alexa Vega) |
| A Promise to Carolyn | 1996 | Actress | Young Kay (as Alexa Vega) |
| It Was Him or Us | 1995 | Actress | Young Carrie (as Alexa Vega) |
| Chicago Hope | 1995 | Actress | Sara Wilmette (as Alexa Vega) |
| McDonald's: Happy Meal 1995 Commercial | 1995 | Actress | Little Girl |
| Nine Months | 1995 | Actress | Molly Dwyer (as Alexa Vega) |
| ER | 1995 | Actress | Bonnie Howe (as Alexa Vega) |
| JC Penny: 1994 Christmas Commercial Short | 1994 | Actress | Daughter |
| Pillsbury Cookies: 1994 Commercial Short | 1994 | Actress | |
| Little Giants | 1994 | Actress | Priscilla O'Shea (as Alexa Vega) |
| Evening Shade | 1993–1994 | Actress | Emily Newton (as Alexa Vega) |
| Get Him Back for Christmas | 2024 | Producer | executive producer |
| Picture Perfect Mysteries: Exit, Stage Death | 2020 | Producer | executive producer |
| Picture Perfect Mysteries: Dead Over Diamonds | 2020 | Producer | executive producer |
| Picture Perfect Mysteries: Newlywed and Dead | 2019 | Producer | executive producer |
| Love at Sea | 2018 | Producer | executive producer |
| Do You Believe? | 2015 | Producer | associate producer |
| Ruby & the Rockits | 2009 | Music Department | performer: theme song "You Are Where I Live" (as Alexa Vega) |
| Enchanted Christmas | 2017 | Soundtrack | performer: "Feels Like Christmas at Last" |
| RebelTaxi | 2015 | Soundtrack | performer: "Seventeen" |
| Muertoons | 2014 | Soundtrack | performer: "The Muertoons Song (Never Forgotten)" |
| The Devil's Carnival | 2012 | Soundtrack | performer: "The Devil's Carnival", "Kiss The Girls" (as Alexa Vega) |
| From Prada to Nada | 2011 | Soundtrack | performer: "Cielito Lindo" (as Alexa Vega) |
| The Middle | 2010 | Soundtrack | performer: "The Star-Spangled Banner" (uncredited) |
| Santa Baby 2: Christmas Maybe | 2009 | Soundtrack | performer: "Christmas Is the Time to Say 'I Love You'" (as Alexa Vega) |
| Ruby & the Rockits | 2009 | Soundtrack | performer: "Humming Medley" |
| Repo! The Genetic Opera | 2008 | Soundtrack | performer: "A Sandwich And A Bug", "21st Century Cure", "Shilo Wakes", "Infected", "Limo Ride", "Inoppurtune Telephone Call", "GraveRobber and Shilo Escape", "Zydrate Anatomy", "Chase the Morning", "Everyone's a Composer", "Come Back!", "What Chance Has a 17 Year Old Girl?", "Seventeen", "Nathan Discovers Rotti's Plan", "At the Opera Tonight", "Needle Through a Bug", "Let the Monster Rise", "Sawman's Lament", "The Man Who Made You Sick", "Cut the Ties", "Shilo Turns Against Rotti", "I Didn't Know I'd Love You So Much", "Genetic Emancipation" (as Alexa Vega) |
| Spy Kids 3: Game Over | 2003 | Soundtrack | performer: "Game Over", "Heart Drive" (as Alexa Vega) |
| Spy Kids 2: Island of Lost Dreams | 2002 | Soundtrack | performer: "Isle of Dreams" (as Alexa Vega) |
| Sex, Lies, and Spray Tans Podcast Series | 2024 | Self | Self - Guest |
| Today | 2022–2023 | Self | Self - Guest |
| The Megyn Kelly Show | 2022–2023 | Self | Self |
| That Sounds Fun with Annie F. Downs Podcast Series | 2022 | Self | Self |
| POPlitics | 2022 | Self | Self |
| Home & Family | 2016–2020 | Self | Self |
| Lex & Los | 2016–2020 | Self | Self |
| On Location - Picture Perfect Mysteries: Exit Stage Death | 2020 | Self | Self |
| Motherhood Unstressed TV Series | 2020 | Self | Self - Guest |
| Blue's Clues & You | 2020 | Self | Self |
| On Location - Picture Perfect Mysteries: Newlywed and Dead | 2019 | Self | Self |
| The Maui Sessions TV Series | 2019 | Self | Self |
| Lex: Pregnancy Vlog TV Series | 2016–2019 | Self | Self |
| Summer Nights Preview Special TV Special | 2018 | Self | Self |
| Love at Sea: On Location Video | 2018 | Self | Self |
| Paradise Run | 2018 | Self | Self - Contestant |
| Enchanted Christmas: On Location Short | 2017 | Self | Self |
| Celebrity Page | 2017 | Self | Self |
| 2017 Hero Dog Awards TV Special | 2017 | Self | Self |
| Ask LexLos TV Series | 2015–2017 | Self | Self |
| That One Audition Podcast Series | 2017 | Self | Self |
| Lex & Los DWTS Season 25 Vlog TV Mini Series | 2017 | Self | Self |
| Mommy Vlog TV Series | 2017 | Self | Self |
| Access Daily | 2017 | Self | Self |
| The Talk | 2017 | Self | Self - Guest Co-Hostess |
| 5 Minute Wow TV Series | 2017 | Self | Self |
| Hollywood Today Live | 2015–2016 | Self | Self |
| Ask Lex TV Series | 2013–2016 | Self | Self |
| Dancing with the Stars | 2015 | Self | Self - Contestant |
| The View | 2015 | Self | Self |
| Good Morning America | 2015 | Self | Self - Guest |
| Entertainment Tonight | 2015 | Self | Self |
| Made in Hollywood | 2013–2015 | Self | Self |
| Nickelodeon Kids Choice Awards 2014 | 2014 | Self | Self |
| Reel Junkie | 2013 | Self | Self (as Alexa Vega) |
| Up Close with Carrie Keagan | 2013 | Self | Self (as Alexa Vega) |
| AssociatedPress Interview: Alexa Vega's New Movie Tackles Teen Pregnancy Short | 2012 | Self | Self (as Alexa Vega) |
| Spy Gadgets Video | 2011 | Self | Self (as Alexa Vega) |
| Spy Kids: Passing the Torch | 2011 | Self | Self (as Alexa Vega) |
| Piper's Picks TV | 2011 | Self | Self - Guest |
| Piper's QUICK Picks | 2011 | Self | Self - Guest (as Alexa Vega) |
| 2011 ALMA Awards | 2011 | Self | Self (as Alexa Vega) |
| From Prada to Nada: Bloopers Video | 2011 | Self | Self (as Alexa Vega) |
| From Nada to Prada: Featurette Video | 2011 | Self | Self (as Alexa Vega) |
| From Prada to Nada: My Family, Mi Familia - Featurette Video | 2011 | Self | Self (as Alexa Vega) |
| Made in Hollywood: Teen Edition | 2011 | Self | Self (as Alexa Vega) |
| From Prada to Nada: Alexa Vega Behind the Scenes Interview Video | 2010 | Self | Self (as Alexa Vega) |
| Broken Hill the Movie - Alexa Vega on Set Short | 2009 | Self | Self (as Alexa Vega) |
| On the Set of Ruby & the Rockits Short | 2009 | Self | Self |
| Paris Hilton's British Best Friend | 2009 | Self | Self (as Alexa Vega) |
| Helix: Behind the Scenes Video | 2008 | Self | Self (as Alexa Vega) |
| CosmoGIRL! Spy: Alexa Vega Short | 2007 | Self | Self (as Alexa Vega) |
| Alexa Vega Talks to Bill Moseley Short | 2007 | Self | Self (voice, as Alexa Vega) |
| Alexa Vega Backstage at Hairspray Short | 2007 | Self | Self (as Alexa Vega) |
| On Location with Remember the Daze | 2007 | Self | Self (as Alexa Vega) |
| The Drop | 2006 | Self | Self (as Alexa Vega) |
| The 100 Greatest Family Films | 2005 | Self | Self (as Alexa Vega) |
| Sleepover: Gag Reel Video | 2004 | Self | Self (as Alexa Vega) |
| Sleepover: Behind-the-Scenes Photo Gallery Video | 2004 | Self | Self (as Alexa Vega) |
| Sleepover: Confessions Video | 2004 | Self | Self (as Alexa Vega) |
| Ready, Set, Action!: Sleepover Featurette Video | 2004 | Self | Self (as Alexa Vega) |
| Sleepover: Meet the Girls Video | 2004 | Self | Self (as Alexa Vega) |
| A Guide to the Perfect Sleepover: Making-of Featurette Video | 2004 | Self | Self (as Alexa Vega) |
| The Teen Choice Awards 2004 | 2004 | Self | Self (as Alexa Vega) |
| On-Air with Ryan Seacrest | 2004 | Self | Self (as Alexa Vega) |
| Total Request Live | 2004 | Self | Self (as Alexa Vega) |
| Nickelodeon Kids' Choice Awards '04 | 2004 | Self | Self (as Alexa Vega) |
| The Teen Choice Awards 2003 | 2003 | Self | Self (as Alexa Vega) |
| Trading Spaces: Boys vs. Girls | 2003 | Self | Self (as Alexa Vega) |
| All That | 2002 | Self | Self |
| CBS Mornings | 2002 | Self | Self (as Alexa Vega) |
| Wild & Crazy Kids | 2002 | Self | Self (as Alexa Vega) |
| Nickelodeon Kids' Choice Awards '02 | 2002 | Self | Self (as Alexa Vega) |
| Total Access 24/7 | 2002 | Self | Self (as Alexa Vega) |
| Hollywood Squares | 2001 | Self | Self - Panelist (as Alexa Vega) |
| Nickelodeon Kids' Choice Awards | 2001 | Self | Self (as Alexa Vega) |
| The Rosie O'Donnell Show | 2001 | Self | Self (as Alexa Vega) |
| The Final Redpill Podcast Series | 2022 | Archive Footage | (archive footage) |
| Home & Family | 2020 | Archive Footage | Self (archive footage) |
| Celebrity Page | 2020 | Archive Footage | Self (archive footage) |
| Entertainment Tonight | 2002–2015 | Archive Footage | Self (archive footage) |