| Little Crackers | 2011 | Writer | memories |
| Gavin & Stacey | 2008–2024 | Actress | Ruth 'Rudi' Smith |
| The Margate Murders | 2024 | Actress | Sarah Bowman |
| The Castaways | 2023 | Actress | Lori |
| Gangsta Granny Strikes Again! | 2022 | Actress | Linda |
| Rosie Molloy Gives Up Everything | 2022 | Actress | Rosie Molloy |
| The Railway Children Return | 2022 | Actress | Annie |
| No Return | 2022 | Actress | Kathy Powell |
| The Teacher | 2022 | Actress | Jenna |
| Four Lives | 2022 | Actress | Sarah Sak |
| Gary Barlow Feat. Sheridan Smith: How Christmas Is Supposed to Be Music Video | 2021 | Actress | Sheridan Smith |
| Hansel & Gretel: After Ever After | 2021 | Actress | Witch |
| Jack and the Beanstalk: After Ever After | 2020 | Actress | The Woman with No Name |
| Isolation Stories | 2020 | Actress | Mel |
| Thunderbirds Are Go | 2020 | Actress | Scraps (voice) |
| Doctor Who: The Further Adventures of Lucie Miller | 2019 | Actress | Lucie Miller (voice) |
| Cleaning Up | 2019 | Actress | Sam |
| The Queen's Corgi | 2019 | Actress | Wanda (voice) |
| Care | 2018 | Actress | Jenny |
| Funny Girl | 2018 | Actress | Fanny Bryce |
| The More You Ignore Me | 2018 | Actress | Gina |
| Pup Star: World Tour | 2018 | Actress | Cece (voice) |
| Ratburger | 2017 | Actress | Sheila |
| Doctor Who: Short Trips | 2016–2017 | Actress | Narrator (voice) |
| Summer Comedy Shorts | 2017 | Actress | Trish |
| Birds Like Us | 2017 | Actress | Gavra (voice) |
| The Moorside | 2017 | Actress | Julie Bushby |
| Walliams & Friend | 2016 | Actress | Various |
| The Huntsman: Winter's War | 2016 | Actress | Mrs. Bromwyn |
| Galavant | 2016 | Actress | Princess Jubilee |
| Black Work | 2015 | Actress | PC Jo Gillespie |
| The C Word | 2015 | Actress | Lisa Lynch |
| Inside No. 9 | 2015 | Actress | Christine |
| Psychobitches | 2014 | Actress | Sleeping Beauty |
| Cilla | 2014 | Actress | Cilla |
| The Widower | 2014 | Actress | Claire Webster |
| The 7.39 | 2014 | Actress | Sally Thorn |
| Quartet: Deleted Scenes | 2013 | Actress | Dr. Lucy Cogan (uncredited) |
| The Harry Hill Movie | 2013 | Actress | Michelle |
| Powder Room | 2013 | Actress | Sam |
| Dates | 2013 | Actress | Jenny |
| Jonathan Creek | 2009–2013 | Actress | Joey Ross |
| Panto! | 2012 | Actress | Tamsin Taylor |
| Mr. Stink | 2012 | Actress | Mother |
| Mrs Biggs | 2012 | Actress | Charmian Biggs |
| The Scapegoat | 2012 | Actress | Nina |
| Quartet | 2012 | Actress | Dr. Lucy Cogan |
| Accused | 2012 | Actress | Charlotte |
| Tower Block | 2012 | Actress | Becky |
| Doctor Who: The Eighth Doctor Adventures | 2006–2011 | Actress | Lucie Miller |
| Little Crackers | 2011 | Actress | Marilyn Smith |
| How to Stop Being a Loser | 2011 | Actress | Lisa |
| Hysteria | 2011 | Actress | Molly |
| Chekhov Comedy Shorts | 2010 | Actress | Natasha |
| The Friday Night Club TV Movie | 2009 | Actress | Miranda |
| Rockton Manor Studios Short | 2009 | Actress | Pansy |
| Two Pints of Lager and a Packet of Crisps | 2001–2009 | Actress | Janet |
| Benidorm | 2009 | Actress | Brandy |
| Grownups | 2006–2009 | Actress | Michelle |
| The Way We Live Right Now TV Series | 2008 | Actress | Ruby Ruggles |
| Defunct | 2008 | Actress | Cherry La Chav |
| Lark Rise to Candleford | 2008 | Actress | Cinderella Doe |
| Love Soup | 2005–2008 | Actress | Cleo Martin |
| Panto the Series TV Movie | 2008 | Actress | Tamsin Taylor |
| Not Today, Thank You Podcast Series | 2006 | Actress | Showbiz Kat |
| The Comic Strip Presents | 2005 | Actress | Angie |
| The Lenny Henry Show | 2005 | Actress | Various Roles |
| The Bill | 2005 | Actress | Janey Giles |
| Fade to Black: Emma | 2005 | Actress | Emma Lassiter |
| Animated Tales of the World | 2000–2004 | Actress | Big Sister |
| Eyes Down | 2003–2004 | Actress | Sandy Beech |
| Mile High | 2004 | Actress | Susie |
| Doctors | 2000–2004 | Actress | Jackie Leavis |
| The Royal | 2003 | Actress | Fran Wheeler |
| Fat Friends | 2002 | Actress | Sharon Wormersley |
| Blood Strangers | 2002 | Actress | Jas Dyson |
| Hawkins | 2001 | Actress | Jez |
| Always and Everyone | 2001 | Actress | Nurse Practitioner |
| Holby City | 2001 | Actress | Miranda Locke |
| The Royle Family | 1999–2000 | Actress | Emma Kavanagh |
| Peaches | 2000 | Actress | Tracey, shop assistant |
| Anchor Me | 2000 | Actress | Young Jackie |
| Where the Heart Is | 2000 | Actress | Vicky |
| Heartbeat | 2000 | Actress | Lyn |
| Dark Ages | 1999 | Actress | Matilda |
| Wives and Daughters | 1999 | Actress | Housemaid |
| The Teacher | 2022 | Producer | associate producer |
| Cilla | 2014 | Music Department | performer: all Cilla's songs performed by |
| Gavin and Stacey: The Out-Takes | 2010 | Thanks | thanks |
| Pup Star: World Tour | 2018 | Soundtrack | performer: "Doggone Shame" |
| Strictly Come Dancing | 2017 | Soundtrack | performer: "My Man" |
| Galavant | 2016 | Soundtrack | performer: "I'm a Different Kind of Princess" (uncredited) |
| Cilla | 2014 | Soundtrack | performer: "A Shot of Rhythm and Blues", "Boys", "Somebody's Always Trying", "Summertime" (uncredited) |
| The Harry Hill Movie | 2013 | Soundtrack | performer: "Down in the Deep Blue Sea" |
| Little Crackers | 2011 | Soundtrack | performer: "Coat Of Many Colors", "You Won't Be Late Tonight Will You Mama?" (uncredited) |
| Two Pints of Lager and a Packet of Crisps | 2003–2008 | Soundtrack | performer: "My Heart Will Go On" |
| The Cruise: Fun-Loving Brits at Sea | 2025 | Self | Self - Narrator (voice) |
| The One Show | 2010–2023 | Self | Self |
| The Cruise | 2022–2023 | Self | Self - Narrator (voice) |
| Kermode & Mayo's Take | 2022 | Self | Self - Guest |
| Starstruck | 2022 | Self | Self - Judge |
| The Jonathan Ross Show | 2012–2021 | Self | Self - Guest |
| Brydon & | 2021 | Self | Self |
| Pooch Perfect UK | 2021 | Self | Self - Presenter |
| Musicals: The Greatest Show | 2021 | Self | Self - Presenter |
| RuPaul's Drag Race UK | 2021 | Self | Self - Guest Judge |
| This Morning | 2012–2021 | Self | Self |
| Billy Connolly: It's Been a Pleasure | 2020 | Self | Self |
| Sheridan Smith: Becoming Mum TV Movie | 2020 | Self | Self |
| Britain's Favourite Detective TV Special | 2020 | Self | Self - Host |
| Isolation Stories: Behind the Scenes | 2020 | Self | Self |
| Sport Relief 2020 | 2020 | Self | Self |
| Cilla: The Lost Tapes | 2020 | Self | Self - Narrator (voice) |
| Dispatches | 2019 | Self | Self - Narrator (voice) |
| The Big Fat Quiz of the Year | 2018 | Self | Self |
| Children in Need | 2018 | Self | Self |
| Lorraine | 2018 | Self | Self - Guest |
| Sheridan Smith: Coming Home TV Movie | 2018 | Self | Self |
| Sheridan | 2017 | Self | Self |
| Strictly Come Dancing | 2017 | Self | Self - Musical Guest |
| Used Car Wars TV Series | 2017 | Self | Self - Narrator |
| Jonathan Creek: The Grinning Man - Deleted Scenes Video | 2017 | Self | Joey Ross (uncredited) |
| Jonathan Creek: The Grinning Man - Silly Stuff Video | 2017 | Self | Self |
| Jonathan Creek: The Grinning Man - Rain Montage Video | 2017 | Self | Joey Ross (uncredited) |
| Jonathan Creek: The Grinning Man - Action Video | 2017 | Self | Self |
| Crackanory | 2017 | Self | Self - Storyteller |
| The Evening Standard Theatre Awards 2016 | 2016 | Self | Self - Presenter |
| Winter's Vistas: The Making of The Huntsman: Winter's War | 2016 | Self | Self - 'Mrs. Bromwyn' |
| BAFTA Televsion Awards 2016 | 2016 | Self | Self |
| Bear Grylls: Mission Survive | 2015 | Self | Narrator (voice) |
| Comic Relief: National Treasures | 2015 | Self | Self |
| Shakespeare Uncovered | 2015 | Self | Self |
| National Television Awards | 2015 | Self | Self |
| Who Do You Think You Are? | 2014 | Self | Self |
| Tower Block: Behind the Scenes Video | 2014 | Self | Self |
| The 07:39 Behind the Scenes Short | 2014 | Self | Self |
| Quartet: Behind the Scenes Featurettes: Dustin Video | 2013 | Self | Self |
| Quartet: Making Quartet Video | 2013 | Self | Self |
| Quartet: Outtakes Video | 2013 | Self | Self |
| The 41st International Emmy Awards TV Special | 2013 | Self | Self - (Nominee) |
| Arqiva British Academy Television Awards | 2013 | Self | Self |
| Quartet: Behind the Scenes Featurettes: Stairlift Video | 2013 | Self | Self |
| The Laurence Olivier Awards 2013 TV Special | 2013 | Self | Self - Host |
| Hysteria: Behind the Scenes Video | 2012 | Self | Self - Actress |
| Bizarre E.R. | 2011 | Self | Self - Narrator (voice) |
| Eurovision Song Contest: Your Country Needs Blue | 2011 | Self | Self |
| Breakfast | 2011 | Self | Self - Actress |
| The Laurence Olivier Awards 2011 TV Special | 2011 | Self | Self - Winner: Best Actress in a Musical |
| Pride of Britain Awards 2010 TV Special | 2010 | Self | Self |
| Variety Club Showbiz Awards 2010 TV Special | 2010 | Self | Self - Caron Keating Award Recipient |
| The Royle Family: Behind the Sofa | 2010 | Self | Self |
| The 5 O'Clock Show | 2010 | Self | Self |
| Loose Women | 2010 | Self | Self |
| Something for the Weekend | 2010 | Self | Self |
| Gavin and Stacey: The Out-Takes | 2010 | Self | Self |
| The Alan Titchmarsh Show | 2009 | Self | Self |
| Two Pints: Series 8 Outtakes TV Movie | 2009 | Self | Self |
| Two Pints: The Love Triangle TV Movie | 2009 | Self | Self |
| Two Pints: Fags, Lads and Kebabs TV Movie | 2009 | Self | Self |
| Comic Relief's Naughty Bits TV Movie | 2009 | Self | Self |
| Love Soup: Deleted Scenes Video | 2008 | Self | Cleo Martin (uncredited) |
| Love Soup: On Location Video | 2008 | Self | Self |
| Love Soup: Out Takes Video | 2008 | Self | Self |
| The Paul O'Grady Show | 2007–2008 | Self | Self |
| The Xtra Factor | 2008 | Self | Self |
| Two Pints: Series 7 Outtakes TV Movie | 2008 | Self | Self |
| Children in Need | 2006 | Self | Self - Performer |
| Love Soup: Outtakes Video | 2005 | Self | Self |
| Stars in Their Eyes | 2005 | Self | Self |
| Hogmanay Live TV Special | 2003 | Self | Self |
| Auntie's Bloomers | 2001 | Self | Self |
| MTV 80s - Jason Donovan's Especially for Christmas: Top 50! TV Special | 2024 | Archive Footage | Sheridan Smith (archive footage) |
| MTV 80s - Andrew Ridgeley Presents 50 Christmas Classics! TV Special | 2024 | Archive Footage | Sheridan Smith (archive footage) |
| Granada Reports | 2018 | Archive Footage | Self (archive footage, uncredited) |
| The Widower | 2014 | Archive Footage | Claire Webster (archive footage, uncredited) |
| Doctor Who: Season 26B | 2013 | Archive Footage | Lucie Miller (archive footage) |
| Two Pints of Lager and a Packet of Crisps | 2011 | Archive Footage | Janet (archive footage, uncredited) |
| Love Soup: Editing Love Soup Video | 2008 | Archive Footage | Cleo Martin (archive footage, uncredited) |
| Ruth & James: The Story of Series 2 Video | 2008 | Archive Footage | Rudi (archive footage, uncredited) |
| We Love the Royle Family TV Movie | 2006 | Archive Footage | Emma (archive footage, uncredited) |