Most Iconic Cameos in Blockbuster Movies
Basically Everyone in Hollywood in Austin Powers in Goldmember
The idea of putting a ton of super famous celebrities has been done before and essentially dates back to Pee-Wee’s Big Adventure, but this film was still an amusing surprise because it’s a big-budget movie-within-the-movie version of Austin Powers with an A-list cast and director.

Basically Everyone in Hollywood in Austin Powers in Goldmember
Sure big names such as Tom Cruise, Gwyneth Paltrow, Kevin Spacey and Danny DeVito were all headliners but there were also lots of unexpected actors such as Carrie Fisher playing a group therapist, unrecognizable John Travolta, police officer Katie Couric, the entire Osborne clan as themselves, FemBot Britney Spears, and even Steven Spielberg.