25 best movie cameos ever

Terminator Salvation – Arnold Schwarzenegger (2009)

The only cameo on the list for which the star didn't actually turn up to film his appearance, this memorable scene featured bodybuilder Roland Kickinger doubling for the Austrian Oak's body while a face cast taken for Arnie's role in the original Terminator was scanned to provide his features. The result dips into the uncanny valley a bit, but frankly you can get away with that if the character's meant to be a killer robot. And it points towards an intriguing future in which Arnie could keep on playing his younger self in future films.