Dermot started his career on T4 for Channel 4 and has presented shows for both ITV and the BBC. His best-known work includes The X Factor, Big Brother's Little Brother, Unicef's Soccer Aid, BBC3's First Time Voters Question Time, the RTS Award winning 'Live from Space' season and the Brit Awards.
Dermot presents a Saturday morning show on BBC Radio 2, 'Saturday Breakfast with Dermot O'Leary'. Previously in the Saturday afternoon slot, 'The Dermot O'Leary Show' won three Sony Radio Awards. The show is produced by Ora Et Labora, the production company Dermot co-founded in 2008.
Ora Et Labora also produces Rylan's BBC Radio 2 show, a number of podcasts and the TV show 'Reel Stories' for BBC2, looking back at iconic singers' lives on screen. Dermot has interviewed Kylie Minogue, Noel Gallagher and Rod Stewart on the show so far, with more episodes planned.
A huge Ernest Shackleton fan, in 2019 he presented the 'Explorers' episode of BBC's 'Icons: The Greatest Person of the 20th Century'. Also in 2019, he launched an interview-based podcast, 'People, Just People' with Audible, featuring guests including Stephen Graham, Ed Miliband and Eni Aluko.
Toto the Ninja Cat and the Mystery Jewel Thief is Dermot's fourth children's book. He lives in London with his wife Dee, their son Kasper and their cats Socks and, of course, Toto.