Kathryn Mullen is a puppeteer who assisted Frank Oz with the puppeteering of Yoda in The Empire Strikes Back. Mullen began performing with the Muppets on The Muppet Show in 1978. She also went on to perform Mokey on Fraggle Rock. She worked as a puppeteer on another Lucasfilm Ltd. production, Labyrinth, directed by Jim Henson.