Double Duty: 14 Actors Who Starred on 2 TV Shows at the Same Time

In 1994, Kudrow landed her iconic role as Phoebe Buffay on another NBC series, Friends. Not only was she the estranged identical twin of her Mad About You character, but Ursula also made a number of appearances during the show's 10-season run; in a crossover episode that aired in 1995, two characters from Mad About You stop into Central Perk and mistake Phoebe for their forgetful Riff's waitress.