Dermot O'Leary (né Seán Dermot Fintan O'Leary, Jr., le à Colchester) est un animateur de télévision et de radio irlandais connu pour avoir présenté l'émission Big Brother's Little Brother sur la chaine britannique Channel 4 puis l'émission The X Factor sur ITV. Il a également sa propre émission de radio sur BBC Radio 2.
Émissions
Télévision
The Big Breakfast
T4 (1999–2001)
The Dogs' Balearics (2000)
Re:covered
Big Brother's Little Brother (2001–2008)
Big Brother Africa (2003)
Big brother around the world (2008)
Teen Big Brother UK (2003)
SAS: Are You Tough Enough? (2002)
Dermot's Sporting Buddies (2002)
Some Of My Best Friends Are... Catholic (2003)
SAS Jungle: Are You Tough Enough? (2003)
Shattered (2004)
Big Brother's Little Breakfast (2006)
Morning Glory (2006)
Big Brother's Big Brain (2006–2007)
1 vs. 100 (2006–2007)
The X Factor (2007–2014)
Big Brother: Celebrity Hijack (2008)
Never Mind the Buzzcocks (2008 - Guest Team Captain, 2009 - Guest Host)
The Paul O'Grady Show (2009) (Guest Presenter)
The National Television Awards 2009 (2010) (Host)
First Time Voters' Question Time, BBC Three, (2010)
Dermot Meets...(David Cameron, Gordon Brown, Danny Mulhern and Nick Clegg), BBC Three (2010)
Soccer Aid (2010) (Host)
Big Brother's Last Supper (2010) (Host)
The National Television Awards 2010-aujourd'hui (Host)
Red Nose Day (2011) (Co-host)
Live from the Royal Wedding (2011) (Host)
The Marriage Ref (2011) (Host)
Brit awards (2017) (Host)
Radio
XFM Weekday Mid-Mornings - (2001–2002)
XFM The Weekender Saturday Evenings - (2002–2003)
BBC Radio 2 Dermot's Saturday Club Saturdays 2-4pm (2004–2005)
BBC Radio 2 The Dermot O'Leary Show Saturdays 5-7pm (2005–2006), Saturdays 4.30-6.30pm (2006–2007), Saturdays 2-4pm, Nov-Dec 2007), Saturdays 2-5pm (2008–2009), Saturdays 3-6pm (2009-)