The Gossip Girl star reached the milestone on 18 July (15), but waited until this weekend (25-26Jul15) to celebrate with a party at the London Hotel in West Hollywood.

He was joined by former castmates including Ed Westwick, Jessica Szohr and Kevin Zegers, as well as his sports star brother-in-law Tony Romo and pop singer JC Chasez.

Crawford was presented with a birthday cake and an ice sculpture emblazoned with the message "Happy 30th Chace", and friends who couldn't attend the party taped a series of videos for him.

The messages included tributes from Matthew Morrison, Bryan Singer, Taylor Kitsch and Stan Sebastian.