Dermot O'Leary raises £643,336 for Comic Relief after completing 24 hour dance marathon along with an all-star support

He danced for 24 hours straight in aid of Comic Relief, and now Dermot O'Leary can put his dancing shoes down after raising a staggering £643,336.

The 41-year-old completed his epic challenge in aid of Red Nose Day, at 7.20pm on Friday after showing off his moves outside BBC Broadcasting House in London for his Day of Dance.

The X Factor presenter fought tiredness and pain to boogie his way to the finish life with help from celebrity pals along the way. 

Well done! Dermot O'Leary can put his dancing shoes down after raising a staggering £643,336 for Comic Relief

Dermot kicked off his challenge at 7:20pm last night and danced non-stop without any sleep until 7:20pm tonight during the BBC's Red Nose Day live coverage.

He was only allowed breaks to go to the toilet, while former Olympian Greg Whyte oversaw the monumental, physical challenge.

The TV presenter, whose dance experience up until now amounted to some fancy spins on the X Factor, kicked things off last night by dancing along to a live performance from Clean Bandit.

Dermot O'Leary EXHAUSTED after 24-hour danceathon

All star-support: Strictly Come Dancing's 2014 champ Caroline Flack dropped by to teach Dermot some of her best moves but ended up getting a lift from the tired star

Show us your moves: The X Factor presenter got stuck in once Caroline arrived to lift his spirits

Winning moves: Caroline appeared to be teaching Dermot some fast-paced steps 

Cheerleaders: X Factor stars and Jamie Oliver hit the floor to get Dermot's feet moving

Work it: Pussycat Dolls star Ashley Roberts didn't let Dermot slack off during her time on the dancefloor

He has also been joined by famous faces and celeb friends including Jamie Oliver, Lenny Henry, The One Show's Matt Baker and Alex Jones and Holly Willoughby.

There's been some starry support from musical special guests too, including a live performance of All Rise from Blue.

After a whole night on the dancefloor, the star was given a welcome boost at breakfast time from Radio 1's Nick Grimshaw who joined his pal as he broadcast his morning show.

Strictly Come Dancing winner Caroline Flack and Pussycat Dolls' Ashley Roberts also helped him out, with the girls teaching them some of their best moves.