The Simpsons: 15 Celebrity Appearances You Might Have Missed

13. Lisa Kudrow

Episode: Lard Of The Dance (Season 10) During the show's tenth series, the Friends star turned up as precocious teen Alex Whitney. While Homer and Bart ploughed their efforts into monopolising the grease industry, Lisa finds competition from Alex, a new girl to the school, who acts way too old for her age, much to the disapproval of the brightest young Simpson. The Phoebe Buffay actress provided plenty of laughs despite getting on the wrong side of Lisa, and eventually drops the 25-year-old city girl act. Cue an enormous grease fight at the end of the episode, courtesy of Homer and Bart's failings. Kudrow was crucial to the episode, and had the perfect voice to make the character truly memorable, particularly in the famously less-cherished Liss-focused episodes list.