Britain's Prince Harry celebrated his 31st birthday at the Cross Keys pub in Chelsea, West London, with his ex-girlfriend Cressida Bonas and 20 other guests.
The flame-haired royal was joined by the 26-year-old actress, whom he split from in April, and 20 other guests as they marked the milestone at the Cross Keys pub in Chelsea, West London with a lavish cake and loud music.
A source told The Sun newspaper: "The party started at about 8pm and went on until about 1.30am. There was even a birthday cake with fireworks coming out of it.
"Cressida turned up with a female friend about 9.30pm and stood at the bar apparently waiting for Harry.
"She was there with him and his inner circle for the rest of the night, which shows how close they are.
"It's very early days and Harry is weighing up his options, but there are obviously still feelings there for Cressida."
News that Cressida attended the Prince's birthday bash is unlikely to go down well with his former squeeze Chelsy Davy, 29, whom he had an on-off relationship with from 2004 to 2010, after reports they've been getting close again following a meet-up in South Africa last month.
The source explained: "Harry wants to try and give his relationship with Cressida one more chance.
"Obviously it's not going to be nice for Chelsy to see, but she remains on good terms with Harry."
Meanwhile, Cressida dumped her boyfriend Edward Holcroft, whom she has been dating for six months, last week because her heart still belongs to the royal hunk.
Harry - the grandson of Queen Elizabeth - has been single since he split from Cressida earlier this year.