Dermot O'Leary (in-universe)

Dermot O'Leary was a presenter for Red Nose Day 2013. He met the Eleventh Doctor when he made a surprise appearance on stage. (TV: The Doctor Appears)

Non-DWU appearances
O'Leary overslept on the day he was due to host the National Television Awards 2011, but the Eleventh Doctor picked him up and got him to the show on time, winding up in different times and places and meeting many famous faces along the way. (NOTVALID: Dermot and the Doctor)