westwood premiere red carpet hangover part III

But Bradley Cooper in a rusty orange suit? Meh!

B. Coop and the boys (Ed Helms, Zach Galifianakis and Justin Bartha) attended The Hangover Part III premiere at Westwood Village Theater in Westwood on Monday evening, and this might be the last time we'll see them all together!

"It's a little sad. It's bittersweet," Cooper told reporters. Helms added, "Of course it's very, very sad. But also very fun. It's a celebration."

Galifianakis said he's going to miss his co-stars the most. "Without sounding too corny, there's a lot of laughing going on on set," he said. "There's a lot of camaraderie. There's a lot of making fun of each other. I will miss that. I won't miss getting made fun of. But I love making fun of the other guys. We click."