Principal puppeteer Paul Fusco (who was mainly left-handed when puppeteering) used his left hand to control ALF's mouth, while his right hand controlled ALF's right arm. Another puppeteer, Lisa Buckley, who would go on to perform on Sesame Street, assisted Fusco beneath the stage, operating ALF's left arm. At times when ALF's full body was shown in the sitting position, Lisa controlled ALF's left hand by cable allowing slight finger movements.