Dermot started his career presenting for T4 then went on to present and produce Big Brother’s Little Brother. In 2007 Dermot landed the coveted role hosting ITV’s The X Factor. Dermot has also chaired the debate and interviewed party leaders for First Time Voters Question Time on BBC3. He regularly presents Unicef’s Soccer Aid and hosted The National Television Awards from 2010-2019. Dermot also hosts his Saturday morning Radio 2 show, Saturday Breakfast with Dermot O’Leary. Previously in the Saturday afternoon slot, The Dermot O’Leary Show won three Sony Radio Awards and was well known for its support of new and emerging bands.

In 2014 Dermot hosted the RTS award winning Live from Space season on Channel 4. A major interactive TV event featuring a live two-hour broadcast from the International Space Station (ISS) and Mission Control in Houston, viewers watched as the ISS completed an entire orbit of the Earth. Later that year Dermot’s first book, The Soundtrack to My Life, a musical memoir, was published by Hodder.

A year on, Dermot presented and co-produced Channel 4’s Battle of Britain, a two-part series commemorating the 75th anniversary of one of the most pivotal moments in British history. The second episode included a live fly-past of over 40 Hurricanes and Spitfires in what was an incredibly emotional day for the survivors, pilots and passengers who attended.

In February 2017 Dermot secured another other live presenting role, hosting the prestigious Brit Awards alongside Emma Willis. A year on he was asked to present the BAFTA Red Carpet Live, interviewing Hollywood A-Listers such as Salma Hayek, Sam Rockwell and Kristen Scott-Thomas. He will be returning to the red carpet again this year to co-present alongside Edith Bowman.

Dermot launched a successful male grooming range with Marks and Spencer in June 2017. The collection ‘24.hr’ includes high quality hair and body wash, face creams and fragrances.

His first Children’s book ‘Toto the Ninja Cat and The Great Snake Escape’ was published in September 2017. After topping various books charts to date, he followed it up with Toto the Ninja Cat and The Incredible Cheese Heist and TOTO the Ninja Cat and the Superstar Catastrophe. A fourth TOTO story will be published in 2020

2018 saw Dermot present and co-produce Reel Stories – a BBC iPlayer pilot featuring an exclusive look back at iconic entertainer’s lives. The episode sees Dermot chatting to Kylie Minogue as they sit back and watch defining moments throughout her career. Following the success of the pilot BBC Two commissioned a series and Dermot recorded shows with Noel Gallagher and Rod Stewart, with more planned for 2020.

In 2019 he took part in BBC Two’s history series, Icons: The Greatest Person of the 20th Century. Travelling from Ireland to Tanzania he explored the lives of world famous explorers including Ernest Shackleton, Gertrude Bell, Neil Armstrong and Jane Goodall, telling the stories behind their legacies.

2019 also saw the launch of his first podcast with Audible. ‘People, Just People’ celebrates people from all walks of lives. Guests so far have included Ed Miliband, Eni Aluko and Stephen Graham. A second series has just launched in April 2020.