Dermot has always declared himself to be proud of his Irish roots.
He is a frequent visitor to Wexford and never forgets to call on his aunt Angela in Mulgannon.
Last June, he was named as one of five new Wexford Ambassadors along with the author John Banville; boxing coach Billy Walsh; singer Michael Londra, and the RTE news presenter Anne Doyle.
His father represented him at a ceremony in Wexford Opera House, accepting an ambassadorial pin on his behalf.
Like Sean he is a keen follower of Wexford GAA and has attended matches in Croke Park over the years.
O' Leary is a household name in Britain, presenting his own show on BBC Radio 2 as well as the X-Factor television talent show which is watched by millions of viewers every week.
His other business interests include co-ownership of the Fishy Fish Restaurant in Brighton.