We Are Young Fun.
The pair were joined by comedian James Corden on a night out in Mayfair, London.
The prince was pictured leaving the Arts Club in West London in the early hours after partying with friends including David Beckham and James Corden.
Corden revealed on Twitter this morning that he stayed sober for the evening while the others had a few drinks.
"AH! That wonderful feeling when you went out with mates but didn't drink and you know how they're all feeling this morning! #feelinggood!" he tweeted.
Harry seemed to be in high spirits as he left the venue, grinning as he jumped into a car waiting at the back door.
David Beckham, who's returned to the UK with his family for Christmas, was also seen leaving the bar with actor pal David Gardner.
Meanwhile, rumours continue to circle that David Beckham's move to French football team Paris Saint Germain is imminent.