
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