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.
Known For
Silence is Golden
Self - Host · (6 episodes)
2025
Bank of Dave 2: The Loan Ranger
Self
2025
That Christmas
Additional Voices (voice)
2024
Dermot O'Leary's Taste of Ireland
Self - Host · (5 episodes)
2024
The Big Fat Quiz of Telly
Self
2024
An Audience with Kylie
Self
2023
Nikki Grahame: Who Is She?
Self
2022
The Pet Show
Self - Presenter · (8 episodes)
2021
Blankety Blank
Self - Panellist · (1 episode)
2021
Caroline Flack: Her Life and Death
Self
2021
Rhod Gilbert's Growing Pains
Guest · (1 episode)
2021
Michael McIntyre's The Wheel
Self - Expert · (5 episodes)
2020
The National Television Awards Celebrate 25 Years
Self
2020
Miranda: My Such Fun Celebration
Self
2020
The X Factor The Band
Self - Host · (4 episodes)
2019
The X Factor Celebrity
Self - Host · (8 episodes)
2019
The Lateish Show with Mo Gilligan
Self · (1 episode)
2019
Reel Stories: Noel Gallagher
Self
2019
Years and Years
Dermot O'Leary · (1 episode)
2019
Small Fortune
Himself - Host · (6 episodes)
2019
The London Studios: Home of the Stars
Presenter
2018
Reel Stories
Self - Host · (10 episodes)
2018
The Great Celebrity Bake Off for Stand Up To Cancer
Self - Guest · (1 episode)
2018
89
Himself
2017
Saving Lives at Sea
Self · (1 episode)
2016
Michael McIntyre's Big Show
Self - Interviewed Guest · (1 episode)
2016
A Christmas Star
Himself
2015
Battle of Britain
Self - Presenter · (2 episodes)
2015
Murder in Successville
(1 episode)
2015
Live from Space
Presenter · (3 episodes)
2014
Celebrity Juice: Too Juicy For TV 2!
Self
2012
Katy Perry: Part of Me
Self (archive footage)
2012
One Direction: A Year in the Making
Self (archive footage)
2011
Celebrity Juice: Too Juicy For TV!
Self
2011
OK! TV
(1 episode)
2011
Harry Hill's TV Burp Gold 3
Self (archive footage)
2010
James Corden's World Cup Live
Self - Guest · (1 episode)
2010
Channel 4's Comedy Gala
(6 episodes)
2010
The National Television Awards Backstage Live
(1 episode)
2010
Celebrity Juice
Self · (6 episodes)
2008
Keith Lemon's Very Brilliant World Tour
Himself · (1 episode)
2008
Big Brother: Celebrity Hijack
Self - Presenter · (33 episodes)
2008
Keeping Up with the Kardashians
Self · (1 episode)
2007
Would I Lie to You?
Self · (1 episode)
2007
1 vs. 100
Self - Host · (16 episodes)
2006
The One Show
Self · (2 episodes)
2006
The One Show
Self - Guest · (1 episode)
2006
Big Brother's Big Brain
(13 episodes)
2006
The X Factor
Self - Presenter · (312 episodes)
2004
Teen Big Brother: The Experiment
Self - Host · (6 episodes)
2003
QI
Self · (1 episode)
2003
The Terry and Gaby Show
(1 episode)
2003
Shattered
(7 episodes)
2003
Harry Hill's TV Burp
Self - Special Guest · (1 episode)
2002
Bo' Selecta!
(1 episode)
2002
Bo' Selecta!
Self · (1 episode)
2002
Ant & Dec's Saturday Night Takeaway
Self · (3 episodes)
2002
Re:covered
(23 episodes)
2002
Big Brother's Little Brother
Self · (4 episodes)
2001
Big Brother's Little Brother
Self - Host · (577 episodes)
2001
It's Only TV But I Like It
Self · (1 episode)
1999
Never Mind the Buzzcocks
Self · (1 episode)
1996
Never Mind the Buzzcocks
Self - Host · (1 episode)
1996
Never Mind the Buzzcocks
Self - Team Captain · (1 episode)
1996
The National Television Awards
Self - Host · (10 episodes)
1995
Soccer AM
Self · (1 episode)
1995
GMTV
Self · (2 episodes)
1993
The Big Breakfast
(60 episodes)
1992
This Morning
Self - Presenter · (63 episodes)
1988
This Morning
Self · (2 episodes)
1988
Comic Relief
(1 episode)
1988
Children In Need
Host · (1 episode)
1980
An Audience with...
Self · (1 episode)
1978
Top of the Pops
Self - Host · (2 episodes)
1964
The BAFTA Awards
Host · (1 episode)
1949