|Born||Seán Dermot Fintan O'Leary, Junior
24 May 1973
|Occupation||Television presenter, Radio DJ and Comedian|
|Employer||BBC, ITV, Syco TV
BBC Radio 2
Big Brother UK
The National Lottery Draws
Celebrity Big Brother
|Spouse(s)||Dee Koppang (m. 2012)|
His early television career saw Dermot present the spin-off show Big Brother's Little Brother on Channel 4 between 2001 and 2008, he also presented a number of other Big Brother spin-off shows including Big Brother Africa and Big Brother Around the World.
Since 2010, Dermot has annually presented National Television Awards airing live from The O2 Arena and airing on ITV, the awards were previously hosted by Trevor McDonald. In 2011, he hosted seven-part series The Marriage Ref for ITV.
O'Leary was born in Colchester, England to parents Sean and Marie, who had moved to the United Kingdom from the Republic of Ireland. He is "extremely proud" of his Irish roots and holds dual British and Irish citizenship. He attended primary school in Marks Tey and later St Benedict's Catholic College in Colchester. He admits that his relaxed attitude at school caused him to fail all but two of his GCSEs. Following that, he re-took his school leaving qualifications before starting his A Level courses at Colchester Sixth Form College. He eventually studied for a degree in Media Studies with Politics, at Middlesex University.
O'Leary started as a disc jockey at Essex Radio before becoming a runner on the TV show Light Lunch with Mel Giedroyc and Sue Perkins and then presenter at Channel 4, part of the original presenting line-up of the channel's T4 strand, before moving on to present Big Brother's Little Brother (the companion show to Big Brother) on E4 from 2001 onwards.
On 27 November 2007, it was announced that Big Brother: Celebrity Hijack was to be O'Leary's last series of Big Brother, and that he would not return in summer 2008. After seven years he made his final Big Brother appearance on 28 January 2008.
On 29 March 2007, it was announced that O'Leary would replace Kate Thornton as the new host of ITV's The X Factor for at least two series. Speaking after the announcement he said: "I was very flattered to be offered the job to host such a hugely successful show. I'm really looking forward to working with Simon Cowell and the team on the kind of Saturday night entertainment show I grew up watching." While presenting the show he reportedly upset Celine Dion among other things, later saying he "literally had to shut her up".
In March 2010, O'Leary hosted a spin-off edition of the BBC One show Question Time, which aired on BBC Three, aimed at first time voters. In June 2010 and May 2012, O'Leary hosted Soccer Aid on ITV, in aid of charity Unicef.
O'Leary joined London's Indie rock station XFM in 2001 firstly presenting weekday mid-mornings from 10 am–1 pm, before moving to a Saturday evening show in mid-2002, where he remained until late 2003.
He joined BBC Radio 2 in September 2004, presenting a Saturday afternoon show entitled Dermot's Saturday Club which ran from 2pm to 4pm. Following a number of changes to the length and timing of O'Leary's programme, due in part to the arrival of Chris Evans to Radio 2 and his role as presenter of The X Factor, his show has broadcast between 3pm and 6pm since April 2009.
O'Leary's Radio 2 show focuses on new music and live sessions, and has featured live sessions from the likes of Oasis, Supergrass, the Raconteurs, Massive Attack, Kasabian, the Guillemots, the Zutons, Alesha Dixon, Beck, the Lemonheads, Lily Allen, Foo Fighters, the Go! Team, Bloc Party, Ben Kweller, the Magic Numbers, Mynoni and Friends, Moby and Kate Nash. O'Leary also hosts Radio 2's coverage of the Brit Awards and South by Southwest. He won a Sony Gold Award for Music Programme of the Year in 2008 and again in 2010 and 2013.
|2001-08||Big Brother's Little Brother||Presenter||Spin-off from the main show|
|2006-07||1 vs. 100||Presenter||Replaced by Ben Shephard from 2008|
|2007—||The X Factor||Presenter||Replaced Kate Thornton|
|2008, 2009||Never Mind the Buzzcocks||Guest Team Captain/Presenter|
|2009||The Paul O'Grady Show||Guest Presenter||Stand-in for Paul O'Grady|
|2010, 2012||Soccer Aid||Presenter|
|2010||Question Time: First Time Voters||Presenter|
|Dermot Meets...||Presenter||Interviewed David Cameron, Gordon Brown, Danny Mulhern & Nick Clegg|
|2010—||The National Television Awards||Presenter||Televised annually in January|
|2011||Red Nose Day||Presenter|
|Live from the Royal Wedding||Presenter|
|The Marriage Ref||Presenter||1 series, 7 episodes|
|2013||From the Heart||Presenter||Telethon special|
|BRITs Icon: Elton John||Presenter||One-off special|
|2014||This Morning||Guest Presenter||Stand-in for one week|
|Live From Space||Presenter||Three episode special|
|2002-03||Saturday evenings||Show called The Weekender|
|2004-05||BBC Radio 2||Saturdays 2-4pm||Show called Dermot's Saturday Club|
|2006-07||Saturdays 4.30-6.30pm||2pm-4pm (during The X Factor months)|
O'Leary supports Arsenal F.C., Celtic, London Irish RUFC and politically the Labour Party and he has identified himself as a socialist. He can be heard on the 'Footballistically Arsenal' podcast with his friends and fellow Arsenal fans Dan Baldwin and Boyd Hilton, and on this show it was mentioned that he owns shares in the club. He supports Wexford GAA in Gaelic Games, attending matches in the past. During an appearance as a studio guest on Fantasy Football Euro 2004, O'Leary spoke of his support for the Republic of Ireland football team.
When O'Leary was in his late teens, he played American football for his local team, the Colchester Gladiators. In his early years, he was good friends with Lord Gimpett, with whom he lived In London. He ran the 2005 London Marathon (his third) under four hours for the first time. In 2007 he was an usher at the wedding of Holly Willoughby. He is also a practising Roman Catholic, having contributed to the collection of essays Why I am Still Catholic in 2005. In the February 2008 issue of the Irish magazine, Social and Personal, O'Leary was voted the sexiest man in Ireland out of the Top 100.
O'Leary has campaigned on behalf of Make Poverty History, and has visited Sierra Leone with CAFOD accompanied by his father. He is also a patron of the male cancer awareness campaign, Everyman. In 2003, he played in a charity match for the Colchester Gladiators as a punt returner, helping to raise £2,500 for the Barnardo's children's fund.
On 19 November 2011 during an episode of The Xtra Factor, it was announced that O'Leary was engaged to his long-term girlfriend Dee Koppang. He married Dee at St Mary's Church, Chiddingstone in Kent, UK on 14 September 2012 arriving at the church in a cream coloured Mercedes-Benz Pagoda.  
On 7 March 2014 Dermot, along with Jeremy Kyle, Bill Bailey, John Prescott, Richard Osman, Rizzle Kicks, Louis Smith, Levi Roots, and Ricky Wilson, all went commando for charity to raise awareness of Testicle Cancer. The promo was released on 24 February 2014.
- "O'Leary talks about his Irish roots". RTÉ News. 15 May 2010.
- Sims, Fiona (12 June 2009). "Fishy Fishy: Dermot O'Leary's restaurant is the reel deal". London: The Times. Retrieved 29 June 2009.
- "Daily Mail: We're too busy for kids but I do want my career-hungry girlfriend to marry me reveals Dermot". 21 August 2009. Retrieved 31 August 2014.
- "Colchester's Dermot O'Leary marries on Friday". Essex County Standard. 13 September 2012.
- "Dermot discusses his dancing - Live Week 5 - The Xtra Factor 2013". YouTube. 2013-11-11. Retrieved 2014-07-04.
- [dead link]
- "Dermot O'Leary upsets Celine Dion". RTÉ Entertainment (14 December 2007)
- Michael Jackson Announces Plans For Summer Residency At The O2 Arena (Dermot O'Leary) Zimbio (5 March 2009)
- Samson, Pete (7 March 2009) What Jacko said to Dermot: Dermot, is the teleprompter on? The Sun
- Youngs, Ian (5 March 2009) 'Final curtain call' for Jackson BBC News Online
- "Michael Jackson announces O2 Arena London gigs - and retirement?" NME 5 March 2009
- Rock Profile:Peter Andre & Jordan Pt.1 Funny or Die
- O'Leary to host episode of Question Time. RTÉ Intertainment. 12 February 2010.
- "Dermot O'Leary to guest present This Morning in January - TV News". Digital Spy. 2013-12-05. Retrieved 2014-07-04.
- "Dermot O'Leary fronts Live from Space Season for Channel 4 - TV News". Digital Spy. 2014-01-09. Retrieved 2014-07-04.
- "Dermot O'Leary wants Rose of Tralee gig". RTÉ Entertainment. 11 August 2009.
- O'Leary: it would be blooming great if I was the new Rose of Tralee host. Belfast Telegraph 15 May 2010.
- Ray D'Arcy hits back at Dermot O'Leary. RTÉ Entertainmeant (19 August 2009)
- O'Leary says he is 'free' for Rose of Tralee. RTÉ Entertainmint. 13 May 2010.
- "BBC Radio 2 - Dermot O'Leary". Bbc.co.uk. 1970-01-01. Retrieved 2014-07-04.
- Rookwood, Dan (7 February 2003) Small Talk: Dermot O'Leary, The Guardian
- Holly Willoughby exclusive: Why she loves wearing those revealing dresses. Daily Mirror.
- "Team History". Colchester Gladiators American Football Club. Retrieved 21 May 2008.
- "Colchester Gladiators - 20th Anniversary Reunion Game". Britball Now. 19 October 2003. Archived from the original on 18 December 2007. Retrieved 13 May 2008.
- Bull, Sarah (2012-09-14). "Sealed with a kiss! Dermot O'Leary gives bride Dee a smooch as pair wed after 10 years together". London: Daily Mail. Retrieved 2013-08-31.
- Fulton, Rick (30 September 2005) Relax, Girls, Dermot Is Not Getting Married The Daily Record
- Williams, Andrew (23 July 2007) 60 SECONDS: Dermot O'Leary Metro
- "My Secret Life: Dermot O'Leary, broadcaster", The Independent 28 July 2007
- "John Prescott, Dermot O'Leary, Bill Bailey and Keith Lemon go commando for Male Cancer Awareness Campaign | The Drum". M.thedrum.com. 2014-02-24. Retrieved 2014-07-04.
- ___Leary_pledges_future_to_Brighton "Dermot O'Leary pledges future to Brighton". The Argus (Brighton). 24 June 2010. Retrieved 24 June 2010.
- "Dermot O'Leary 'forced to close' fish restaurant - ITV News". Itv.com. 2013-03-10. Retrieved 2014-07-04.
- "Radio 2 - Dermot O'Leary - Biography". BBC. Retrieved 2014-07-04.
- Dermot's Official Twitter
- Dermot O'Leary at BBC Programmes
- Dermot O'Leary at itv.com/xfactor
- Profile/interview in MaleFirst.co.uk
- Xfactor Uk 2011 community
|Host of The X Factor