'Friends' celebrity guest stars

Everyone’s favorite sitcom “Friends” highlighted a number of already-big and soon-to-be stars during its ten-year run, from George Clooney and Jay Leno’s performances in its very first season, to Danny Devito’s stint as a sobbing male stripper in season ten. Who could forget Monica’s pre-Chandler romance with Dr. Richard Burke (played by Tom Selleck and his guest-starring mustache), or Anna Faris’s recurring role as Erica, mother to Chandler and Monica’s adopted twins? Or how about baby Cole Sprouse’s yearslong gig as Ben Geller, Ross’s son?