<Li> Twink Caplan as Rona </Li> <Li> Joy Boushel as Melissa </Li> <Li> Abe Vigoda as Grandpa Vincent Ubriacco </Li> <Li> Christopher Aydon as Michael "Mikey" Jensen (age 2 years) <Ul> <Li> Jacob Haines as Mikey (age 1 year) </Li> <Li> Jaryd Waterhouse as Mikey (age 6 months) </Li> <Li> Jason Schaller as Mikey (fetus - newborn) </Li> </Ul> </Li>

Who played the baby in look who's talking