For a die-hard fan, it may seem like all of Hollywood's biggest stars eventually made their way onto hit sitcom Friends.
During its decade-long run, "Friends" boasted a litany of guest stars, like Julia Roberts, George Clooney, Brad Pitt, and Tom Selleck. For 10 episodes across Seasons 2, 3, and 6, Selleck played Dr.
The episode, for example, got Brooke Shields her own sitcom and Matthew Perry a relationship with Julia Roberts.