Dermot O'Leary net worth: Dermot O'Leary is an English television and radio presenter who has a net worth of $4 million. Born in Colchester, Essex, England, Dermot O'Leary earned a degree in Media, Television, and Politics from Middlesex University. He began his professional career as a DJ, working for Essex Radio. He then became a gofer/runner on the set of "Light Lunch". He then launched a successful career as a presenter, beginning with work for T4. He presented eight seasons of "Big Brother's Little Brother", and then went on to host the game show, "1 vs. 100". He is currently a co-presenter on "The X Factor" in the UK, and he also hosts the show, "Rock Profile". He hosts a show on BBC Radio 2 on Saturdays from 3-6, and also hosts multiple award programs and charity events. Most recently, he has hosted Soccer Aid and The National Television Awards. He has expressed repeated interest in hosting "Rose of Tralee".