It’s always a fun treat when a now-famous actor pops up in a small role in an older movie you haven’t re-watched in a while.  We previously posted a “Before They Were Famous” supercut, but now someone has edited together a montage of actors in their very first feature film roles. While you’re most likely aware of the majority of these appearances, I’m willing to bet you’ll find at least a few surprises in this video.  I had no idea Jon Hamm was in Clint Eastwood’s “old guys can be astronauts too” movie Space Cowboys, but I now feel compelled to move the pic to the top of my Netflix queue.Watch Jack Nicholson, Woody Allen, Emma Thompson, Zach Braff and many more make their feature debut after the jump.Video comes courtesy of Flavorwire: