Tropic Thunder
Probably the most fun I'll have watching a film for a long time... seen it about 6 times and it still makes me laugh so much. Just an all star cast having fun and a script that makes fun of itself and other films for an hour and 47 minutes. It's definitely not 5 stars but it's getting 5 stars purely for its entertainment. So many quotable moments and just outright shocking scenes. Tom cruise and Robert Downey Jr undergo crazy transformations, in some scenes I completely forget it's them. Matthew McConaughey and Jay Baruchel are really funny. The whole cast really. Such a fun watch especially with a group of people.