Dermot O'Leary completes Comic Relief 24-hr dance-a-thon

Dermot O'Leary, who danced for 24 hours straight in aid of Comic Relief, has raised a staggering 643,336 pounds.

The 'X Factor' host, who danced in front of BBC Broadcasting House in an effort to raise money for Red Nose Day, was gobsmacked when generous viewers donated well over half a million pounds, the Daily Star reported.

O'Leary, who was joined by Davina McCall and Lenny Henry at the London Palladium, got emotional as he heard the final total and said that his feet has seen better days, adding "2-6 last night was the worst" as all his friends had left at 2am.

The 41-year-old, who was inspired to do the dance-a-thon after meeting children in Kenya whose parents had died when they were very young, was treated to Eric Prydz's 'Call On Me,' Taylor Swift's 'Shake It Off' and Beyonce's 'Crazy In Love' as he danced from the BBC to the London Palladium for the big finale

O'Leary was joined by celebrity pals including Caroline Flack, Rufus Hound, Ashley Roberts and Nick Grimshaw, as well as 2014 'X Factor' finalists.