Ansel Egort cut loose for the big 2-2!
It seems the Allegiant star
had a pretty raucous night (and cake!) at the afterparty for the film's premiere on Monday, which happened to land on the same day as the actor's birthday. A source tells ET, "The party was nuts."
"Shailene [Woodley] was 'dirty dancing,'" the source adds, referring to Ansel's co-star in the movie. "She changed into a tank top and jeans, and they were grinding in the middle of the VIP."
Shailene apparently debated over whether to wear a dress for the big night, but ultimately opted for an Elie Saab jumpsuit, telling ET, "Dude, I am so all about pants life."
"Theo [James] was rowdy and doing these weird chants, Ansel dancing up on the tables," the source continues. "All sharing clove cigarettes."
Ansel posted about the fun evening on Instagram on Tuesday, writing, "Last night at the Allegiant premier after party, surrounded by friends and family as they brought out a cake and sang. What a moment ."
The actor kept it very fashion-forward at the premiere, rocking a thick white collar that many mistook for a towel. Ansel showed off the style accoutrement in an Instagram video with the "Damn, Daniel" kids.
Allegiant hits theaters this Friday.