Source: Universal Pictures [1]

While you may have caught most of the comedian cameos in Trainwreck [2], there's one actress that's perhaps the most difficult to identify: Tilda Swinton. The Oscar winner is practically camouflaged behind a wig and a wall of makeup as Dianna, Amy's boss at a ridiculous men's magazine. For reference, here's Swinton on the red carpet:

Source: Getty [3]

And here she is in the movie:

Source: Universal Pictures [4]

"I'm delighted to say that I'm unrecognizable," Swinton said in an interview [5] with The Huffington Post. "I don't know whether one would really want to be recognizable in this role. It's a lot of makeup and a kind of tandoori tan and a wig, and that's all it takes." Crazy.