Seán Dermot Fintan O'Leary is an English broadcaster who currently works for ITV and BBC Radio 2. His radio career began when he worked as a disc jockey at Essex Radio, but he is best known for being the presenter of The X Factor on ITV, a position he held from 2007 until its final series in 2018, with the exception of 2015. Since 2021, O'Leary has presented ITV's This Morning on Fridays, school holidays and bank holidays alongside Alison Hammond.

Filmography

• 2024That Christmas — Additional Voices (voice)
• Rhod Gilbert's Growing Pains — Guest
• Ted Lasso — Dermot O'Leary
• Years and Years — Dermot O'Leary
• Reel Stories — Self - Host, Producer
• 2018The London Studios: Home of the Stars — Presenter
• Murder in Successville
• Inside No. 9 — Dermot O'Leary
• Live from Space — Presenter
• OK! TV
• Channel 4's Comedy Gala
• 2010Paul McCartney & Wings: Band on the Run
• The National Television Awards Backstage Live
• Big Brother's Big Brain
• The F Word
• Shattered
• The Terry and Gaby Show
• Re:covered
• The Big Breakfast
• Comic Relief
• The BAFTA Awards — Host

Appearances as themselves (57)

• 2025Bank of Dave 2: The Loan Ranger — Self
• Silence is Golden — Self - Host
• Dermot O'Leary's Taste of Ireland — Self - Host
• 2023An Audience with Kylie — Self
• 2022Nikki Grahame: Who Is She? — Self
• Blankety Blank — Self - Panellist
• 2021Caroline Flack: Her Life and Death — Self
• The Pet Show — Self - Presenter
• The Weakest Link — Self - Contestant
• Michael McIntyre's The Wheel — Self - Expert
• 2020Miranda: My Such Fun Celebration — Self
• 2020The National Television Awards Celebrate 25 Years — Self
• 2019Reel Stories: Noel Gallagher — Self
• Small Fortune — Himself - Host
• The Lateish Show with Mo Gilligan — Self
• The X Factor Celebrity — Self - Host
• The X Factor The Band — Self - Host
• The Great Celebrity Bake Off for Stand Up To Cancer — Self - Guest
• 201789 — Himself
• Michael McIntyre's Big Show — Self - Interviewed Guest
• Saving Lives at Sea — Self
• 2015A Christmas Star — Himself
• Battle of Britain — Self - Presenter
• 2012Celebrity Juice: Too Juicy For TV 2! — Self
• 2012Katy Perry: Part of Me — Self (archive footage)
• 2011Celebrity Juice: Too Juicy for TV! — Self
• 2011One Direction: A Year in the Making — Self (archive footage)
• 2010Harry Hill's TV Burp Gold 3 — Self (archive footage)
• James Corden's World Cup Live — Self - Guest
• CBeebies Bedtime Stories — Self
• Big Brother: Celebrity Hijack — Self - Presenter
• Celebrity Juice — Self
• Keith Lemon's Very Brilliant World Tour — Himself
• 2007Big Brother: Around the World — Self - Host
• Keeping Up with the Kardashians — Self
• Would I Lie to You? — Self
• 1 vs. 100 — Self - Host
• The One Show — Self
• 2004A Bear's Christmas Tail — Self
• The X Factor — Self - Presenter
• QI — Self
• Teen Big Brother: The Experiment — Self - Host
• Ant & Dec's Saturday Night Takeaway — Self
• Bo' Selecta! — Self
• Harry Hill's TV Burp — Self - Special Guest
• Big Brother's Little Brother — Self, Self - Host
• It's Only TV But I Like It — Self
• Never Mind the Buzzcocks — Self, Self - Host, Self - Team Captain
• Soccer AM — Self
• The National Television Awards — Self - Host
• GMTV — Self
• This Morning — Self - Presenter
• Children In Need — Self
• An Audience with... — Self
• The BRIT Awards — Self - Host
• Top of the Pops — Self - Host
• Big Brother: After They Were Housemates — Self