Because they were friends first, Joey was always supportive of Rachel's dreams. Never forget when Rachel was at first appalled to have to live with Joey instead of Monica (after Phoebe's apartment ...

Which is why it felt like a nasty mind-bending exercise when Courteney Cox revealed in the Friends reunion last year that she was originally slated to play Rachel. Yes, you read it correctly.

The viral filter landed on all of the other Friends characters ... classic sitcom — Rachel, Ross, Joey, Phoebe and Chandler — before finally landing on her character of Monica.