| Katherine Jenkins Christmas Spectacular | 2020 | Writer | Writer |
| Minamata | 2020 | Actress | Millie |
| Dream Horse | 2020 | Actress | Katherine Jenkins (as Katherine Jenkins OBE) |
| The Missing Crown Jewels | 2017 | Actress | Agent O |
| Katherine Jenkins: Silent Night Music Video | 2014 | Actress | Katherine Jenkins |
| Under Milk Wood | 2014 | Actress | Polly Garter |
| Doctor Who | 2010 | Actress | Abigail |
| Katherine Jenkins: Angel Music Video | 2009 | Actress | |
| Katherine Jenkins: Bring Me to Life Music Video | 2009 | Actress | Katherine Jenkins |
| Emmerdale Farm | 2007 | Actress | Katherine Jenkins |
| Bodies | 2023 | Soundtrack | performer: "Agnus Dei, Op. 11" |
| Songs of Praise | 2017–2022 | Soundtrack | performer: "Requiem for a Soldier" |
| Credlin | 2022 | Soundtrack | performer: "God Save the King" |
| Katherine Jenkins at 40 TV Movie | 2020 | Soundtrack | performer: "Over the Rainbow", "We'll Meet Again", "A Nightingale Sang in Berkeley Square", "World in Union", "One Single Voice (Theme from Minamata)", "Singin' in the Rain", "I'll Never Love Again (From A Star is Born)", "When You Wish Upon A Star (From Pinocchio)", "Make Me a Channel of Your Peace", "How Great Thou Art", "Jealous of the Angels", "Here's to the Heroes (From Dances With Wolves)" |
| Sky News Today | 2020 | Soundtrack | performer: "We'll Meet Again" |
| VE Day 75: The People's Celebration | 2020 | Soundtrack | performer: "Somewhere Over the Rainbow", "We'll Meet Again" |
| Dream Horse | 2020 | Soundtrack | performer: "Hen Wlad Fy Nhadau aka Land Of My Fathers" |
| Katherine Jenkins: Home for Christmas TV Movie | 2016 | Soundtrack | performer: "The Christmas Song", "Ding Dong Merrily On High", "Heroes", "Silent Night", "Sleep Quietly My Jesus", "Santa Baby", "Time to Say Goodbye", "I Wish You Christmas", "O Holy Night", "Have Yourself a Merry Little Christmas" |
| Doctors | 2009–2015 | Soundtrack | performer: "The Flower Duet" |
| Strictly Come Dancing | 2009–2014 | Soundtrack | performer: "We'll Gather Lilacs" |
| Spud 2: The Madness Continues | 2013 | Soundtrack | performer: "Jerusalem" |
| Steppin' Out with Katherine Jenkins | 2012 | Soundtrack | performer: "The Continental", "Someone to Watch Over Me", "Steppin' Out", "The Christmas Song (Chestnuts Roasting on an Open Fire)", "Over the Rainbow", "Ancora Non Sai", "O Holy Night", "O Come O Come Emmanuel", "In Dulci Jubilo/Hark the Herald Angels Sing (Medley)" |
| Dancing with the Stars | 2011–2012 | Soundtrack | performer: "Come What May" |
| The Tonight Show with Jay Leno | 2012 | Soundtrack | performer: "Bring Me to Life" (uncredited) |
| The One Show | 2011 | Soundtrack | performer: "Break it to My Heart" |
| Doctor Who | 2010 | Soundtrack | performer: "In the Bleak Midwinter", "Abigail's Song (Silence Is All You Know)" (uncredited) |
| This Morning | 2009–2010 | Soundtrack | performer: "Tell Me I'm Not Dreaming" |
| Spud | 2010 | Soundtrack | performer: "Dear Lord and Father of Mankind" |
| The Alan Titchmarsh Show | 2010 | Soundtrack | performer: "Love Never Dies" |
| Dancing on Ice | 2010 | Soundtrack | performer: "Love Never Dies" |
| Dancing on Ice Friday | 2010 | Soundtrack | performer: "Bring Me to Life" |
| GMTV | 2009 | Soundtrack | performer: "Bring Me to Life" |
| Katherine Jenkins: A Girl from Neath TV Movie | 2008 | Soundtrack | performer: "L'Amore Sei Tu (I Will Always Love You)", "Hallelujah" (uncredited) |
| Viva la Diva: Darcey Bussell and Katherine Jenkins | 2008 | Soundtrack | performer: "The Deadwood Stage", "Secret Love", "People", "La Vie en Rose", "Let Me Entertain You", "Diamonds Are a Girl's Best Friend", "Chanson Boheme", "The Man That Got Away", "Una Voce Poco Fa", "You Can't Do Wrong Doing Right", "Viva Tonight" |
| Sunday Brunch | 2014–2024 | Self | Self |
| D-Day 80 at the Royal Albert Hall TV Special | 2024 | Self | Self |
| Songs of Praise | 2005–2023 | Self | Self |
| The Jonathan Ross Show | 2012–2023 | Self | Self - Guest |
| Christmas with Katherine Jenkins TV Special | 2023 | Self | Self - Performer |
| Good Morning Britain | 2018–2023 | Self | Self |
| Love Your Weekend with Alan Titchmarsh | 2021–2023 | Self | Self |
| The Journey: A Music Special from Andrea Bocelli | 2023 | Self | Self |
| An Evening with Patrick Hamilton & friends TV Special | 2023 | Self | Self |
| Celebrating 7 Decades of Her Majesty | 2022 | Self | Self |
| Experience: The Platinum Jubilee | 2022 | Self | Self |
| Credlin | 2022 | Self | Self - Welsh Singer |
| The Queen's Platinum Jubilee 2022: The Platinum Pageant | 2022 | Self | Self |
| The Queen's Platinum Jubilee Celebration | 2022 | Self | Self (as Katherine Jenkins OBE) |
| Anyone Can Sing TV Series | 2022 | Self | Self |
| Crouchy's Year-Late Euros | 2021 | Self | Self - Guest |
| This Morning | 2008–2021 | Self | Self |
| Katherine Jenkins Christmas Spectacular | 2020 | Self | Self |
| Lorraine | 2018–2020 | Self | Self - Guest |
| Martin & Roman's Weekend Best! | 2020 | Self | Self |
| Loose Women | 2005–2020 | Self | Self |
| Saturday Kitchen | 2008–2020 | Self | Self |
| Katherine Jenkins at 40 TV Movie | 2020 | Self | Self |
| The One Show | 2009–2020 | Self | Self - Reporter |
| VE Day 75: The People's Celebration | 2020 | Self | Self |
| Jeremy Vine | 2020 | Self | Self - Marking VE Day with a virtual concert |
| The Big Night In | 2020 | Self | Self |
| The Masked Singer UK | 2020 | Self | Self - Octopus |
| The London Studios: Home of the Stars TV Movie | 2018 | Self | Self - Saturday Night Takeaway Guest (uncredited) |
| Michael McIntyre's Big Show | 2016–2018 | Self | Self - Guest |
| National Lottery Awards 2018 TV Special | 2018 | Self | Self |
| Wimbledon | 2016–2017 | Self | Self - Spectator (uncredited) |
| Ant & Dec's Saturday Night Takeaway | 2016–2017 | Self | Self |
| Katherine Jenkins: Home for Christmas TV Movie | 2016 | Self | Self - Host |
| Weekend | 2016 | Self | Self - Guest |
| BAFTA Televsion Awards 2016 | 2016 | Self | Self - Presenter |
| The Nation's Favourite Disney Song | 2015 | Self | Self - Singer |
| National Memorial Day Concert TV Series | 2010–2015 | Self | Self |
| VE Day 70: A Party to Remember TV Special | 2015 | Self | Self |
| Live with Kelly and Mark | 2012–2015 | Self | Self - Musical Guest |
| The Alan Titchmarsh Show | 2009–2014 | Self | Self |
| A Christmas Cracker TV Movie | 2014 | Self | Self |
| Christmas from Holy Trinity TV Special | 2014 | Self | Self |
| Being Katherine Jenkins TV Movie | 2014 | Self | Self |
| Weekend Kitchen with Waitrose TV Series | 2014 | Self | Self |
| Strictly Come Dancing | 2007–2014 | Self | Self - Musical Guest |
| BBC Proms TV Series | 2014 | Self | Self |
| Our Gay Wedding: The Musical | 2014 | Self | Self |
| Britain's Secret Treasures | 2013 | Self | Self |
| Daily Mirror: The Pride of Britain Awards | 2013 | Self | Self |
| Max Boyce's Big Birthday TV Special | 2013 | Self | Self |
| BBC Proms | 2013 | Self | Self |
| Music for Mandela | 2013 | Self | Self - Interviewee |
| That Puppet Game Show | 2013 | Self | Self - Guest |
| The Queen's Coronation Festival Gala TV Special | 2013 | Self | Self |
| The BRIT Awards 2013 | 2013 | Self | Self |
| 2012 Pioneer Day Concert with Kathrine Jenkins: The Joy of Song TV Special | 2012 | Self | Self |
| Good Morning America | 2012 | Self | Self - Musical Guest |
| The Nation's Favourite Christmas Song TV Movie | 2012 | Self | Self |
| CMA Country Christmas TV Movie | 2012 | Self | Self |
| Rachael Ray | 2012 | Self | Self - Performer |
| The Late Late Show | 2005–2012 | Self | Self |
| The Chew | 2012 | Self | Self - Musical Guest |
| 100 Years of the Royal Variety Performance | 2012 | Self | Self |
| Strictly Come Dancing: It Takes Two | 2007–2012 | Self | Self |
| The Royal Variety Performance 2012 | 2012 | Self | Self - Performer |
| Steppin' Out with Katherine Jenkins | 2012 | Self | Self |
| Dancing with the Stars | 2011–2012 | Self | Self - Musical Guest |
| Piers Morgan Live | 2012 | Self | Self |
| The Tonight Show with Jay Leno | 2012 | Self | Self - Musical Guest |
| The Late Late Show with Craig Ferguson | 2012 | Self | Self - Guest |
| Daybreak | 2011–2012 | Self | Self - Guest |
| One Direction: The Only Way Is Up | 2012 | Self | Self - Guest |
| Disney Parks Christmas Day Parade | 2011 | Self | Self |
| Fern Britton Meets... TV Series | 2011 | Self | Self - Guest |
| Chris Moyles Quiz Night | 2011 | Self | Self |
| Something for the Weekend | 2011 | Self | Self - Guest |
| BBC Proms | 2011 | Self | Self |
| Popstar to Operastar | 2010–2011 | Self | Self - Mentor |
| Holst: In the Bleak Midwinter | 2011 | Self | Self - Singer |
| The Man Who Changed the World: Mikhail Gorbachev's 80th Birthday Gala Video | 2011 | Self | Self |
| Brit Awards 2011 | 2011 | Self | Self |
| Doctor Who Confidential | 2010 | Self | Self |
| The Graham Norton Show | 2009–2010 | Self | Self - Guest |
| Breakfast | 2008–2010 | Self | Self - Mezzo-Soprano |
| Christmas in Rockefeller Center | 2010 | Self | Self |
| Feste der Volksmusik | 2010 | Self | Self |
| Katherine Jenkins: Believe Live from the O2 | 2010 | Self | Self - Singer |
| Willkommen bei Carmen Nebel | 2010 | Self | Self |
| Vivement dimanche | 2010 | Self | Self |
| Magic Numbers TV Series | 2010 | Self | Self |
| Morgenmagazin | 2010 | Self | Self |
| Who Wants to Be a Millionaire | 2010 | Self | Self - Contestant |
| De Leeuw op zondag TV Series | 2010 | Self | Self |
| Taniec z gwiazdami | 2010 | Self | Self - Special Guest |
| GMTV | 2004–2010 | Self | Self |
| Dancing on Ice | 2010 | Self | Self |
| Dancing on Ice Friday | 2010 | Self | Self |
| Brit Awards 2010 | 2010 | Self | Self |
| Blood on Your Hands Short | 2009 | Self | Self (uncredited) |
| Carols in the Domain TV Special | 2009 | Self | Self |
| The Royal Variety Performance 2009 | 2009 | Self | Self - Performer |
| Children in Need Rocks the Royal Albert Hall | 2009 | Self | Self - Performer |
| Live from Studio Five | 2009 | Self | Self |
| Piers Morgan's Life Stories | 2009 | Self | Self |
| Pride of Britain Awards 2009 TV Special | 2009 | Self | Self |
| BBC Proms | 2009 | Self | Self |
| The Week We Went to War TV Series | 2009 | Self | Self - Presenter |
| The Paul O'Grady Show | 2005–2009 | Self | Self |
| The Apprentice UK | 2009 | Self | Self |
| Brit Awards 2009 | 2009 | Self | Self |
| Katherine Jenkins: Intimate & Romantic TV Special | 2008 | Self | Self - Performer |
| Katherine Jenkins: A Girl from Neath TV Movie | 2008 | Self | Self - Presenter |
| Viva la Diva: Darcey Bussell and Katherine Jenkins | 2008 | Self | Self - Performer |
| Quantum of Solace: Royal World Premiere Special | 2008 | Self | Self |
| The Wright Stuff | 2005–2008 | Self | Self - Guest Panelist |
| Sunday AM | 2008 | Self | Self - Opera Singer |
| Happy Hour | 2008 | Self | Self |
| London 2012 Party TV Special | 2008 | Self | Self |
| 9am with David & Kim | 2008 | Self | Self - Guest |
| Brit Awards 2008 | 2008 | Self | Self |
| Richard & Judy | 2008 | Self | Self |
| Friday Night with Jonathan Ross | 2008 | Self | Self - Special Guest |
| The X Factor UK | 2007 | Self | Self - Special Guest |
| The South Bank Show | 2007 | Self | Self |
| The Royal Variety Performance 2007 | 2007 | Self | Self |
| Variety Club Showbiz Awards 2007 TV Special | 2007 | Self | Self - Winner |
| The National Television Awards 2007 | 2007 | Self | Self - Presenter |
| The Big Questions | 2007 | Self | Self |
| Have I Been Here Before? | 2007 | Self | Self |
| That Antony Cotton Show | 2007 | Self | Self |
| Britain's Favourite View TV Series | 2007 | Self | Self |
| Parkinson | 2006 | Self | Self |
| The Best of the Royal Variety | 2006 | Self | Self |
| Herzlichen Glückwunsch - Die Michael Schanze Jubiläumsgala TV Mini Series | 2006 | Self | Self - Musician |
| Another Audience with Shirley Bassey TV Special | 2006 | Self | Self |
| Today with Des and Mel | 2004–2006 | Self | Self |
| One Person Can Make a Difference TV Special | 2006 | Self | Self |
| Nobel Peace Prize Concert | 2005 | Self | Self |
| The Royal Variety Performance 2005 TV Special | 2005 | Self | Self - Opera Singer |
| The Heaven and Earth Show | 2005 | Self | Self |
| This Week | 2005 | Self | Self |
| Live 8 | 2005 | Self | Self - Berlin |
| Classical Brit Awards 2005 TV Special | 2005 | Self | Self - Performer |
| Madonna Mania TV Movie | 2005 | Self | Self - Performer |
| The Variety Club Tribute to Esther Rantzen TV Special | 2004 | Self | Self |
| In the Know TV Series | 2004 | Self | Self |
| Classical Brits 2004 TV Special | 2004 | Self | Self |
| Kelly | 2004 | Self | Self |
| The Sunday Programme TV Series | 2004 | Self | Self |
| Songs of Praise | 2018–2022 | Archive Footage | Self - Performer |
| Ant & Dec's Saturday Night Takeaway | 2017 | Archive Footage | Self (archive footage) |
| Darcey Bussell: My Life on the BBC TV Movie | 2016 | Archive Footage | Self - Performer (archive footage) |
| Children in Need 2010 | 2010 | Archive Footage | Abigail Pettigrew (archive footage) |
| Los nuevos y clásicos bloopers TV Series | 2010 | Archive Footage | Self (archive footage) |
| The Graham Norton Show | 2009 | Archive Footage | Self (archive footage) |