Justin Bieber: Men In Black III Alien!

Justin Bieber heads out of his hotel in London on Thursday morning (April 26).

The 18-year-old musician was greeted by a crowd of female fans who just didn’t want to see him leave.

PHOTOS: Check out the latest pics of Justin Bieber

Did you know that Justin is going to be in Men In Black III? And he’s an alien!

Director Barry Sonnenfeld spilled the beans in a recent interview with Collider: “I can’t remember who we had in the second one [as aliens], but in this one there are a few people that you’ll see up on the surveillance board including Lady Gaga, Tim Burton, who probably knows more about aliens then I do, and let’s see who else…Justin Bieber…”

Justin is also pictured headed to the recording studio in London wearing Vans.