When Bradley Cooper decides to crash a photo shoot, he does so in style. Recently, at Georgetown University, the "American Sniper" actor crashed a couple's wedding photo shoot.

Bradley Cooper's crash was unintentional. The actor was there to visit his alma mater, Georgetown University. It was then he noticed that there was a couple posing.

He decided to make his own sequel to "Wedding Crashers." Newly weds Meaghan Carrigan and Nicholas Barnicle were getting their photographs taken on campus until Bradley Cooper makes his surprise entrance, cites NY Daily News.

The newly weds were totally not expecting an A-list actor making an appearance. Their wedding photographer did not blink twice. He made sure to take snaps of the couple with the actor. However, he was not dressed for the occasion at all. He only wore a T-shirt and a pair of jeans when he photobombed the pictures.

As the couple walked around the campus, Bradley Cooper made them feel at ease and congratulated them. He also attended a family lunch out with the couple at Washington, D.C's Cafe Milano. But he did not stay long. He had to leave to go to President Obama's final White House concert. He left after the bride threw the boquet.

The concert showcases Jill Scott, Bell Biv DeVoe and Janelle Monae.

He was not the only celebrity to make a surprise appearance this week. Aside from Bradley Cooper, pop star Justin Bieber also made a shocking appearance. He gate crashed a Manchester University this week. Students at Tiger Tiger, the night club, were not expecting to receive a music star take over the DJ Booth.

Taboo Tuesdays at Tiger Tiger would never be the same again after that Bieber experience.

Those who were at the venue noted that he walked in with his entourage a little after midnight. Talk about a surprise. He was with about 20 people, according to onlookers. And he hung out with some members of the Manchester Hockey team.

Are celebrities popping up in universities and school parties a thing now? Sound off in the comments section!