The old saw about most rock stars being failed actors doesn't quite pertain to the world of indie and alternative rock, but that doesn't mean hipster musicians don't love hanging out with Hollywood stars. In fact, there have been many instances over the years where bands have called on actors -- some friends and acquaintances, others hired guns -- to play interesting, often hilarious roles in their music videos. The following are 10 of the most memorable cameo appearances by Hollywood actors in indie or alt-rock music videos. Break out the popcorn and get ready to rock!