Itâs always a fun treat when a now-famous actor pops up in a small role in an older movie you havenât re-watched in a while. We previously posted a âBefore They Were Famousâ supercut, but now someone has edited together a montage of actors in their very first feature film roles. While youâre most likely aware of the majority of these appearances, Iâm willing to bet youâll find at least a few surprises in this video. I had no idea Jon Hamm was in Clint Eastwoodâs âold guys can be astronauts tooâ 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: