Sophia Jo Ranft is an American actress and voice actress.

She is the daughter of the late Pixar storyboard artist Joe Ranft, who died in a car crash in August 2005 when Sophia was only 9 years old. Sophia also has a brother Jordy, who has also cameoed in a few Pixar films.

She performed the voice of Baby Smitty in Monsters, Inc.

Sophia and her mother Sue accepted her father Joe Ranft's Disney Legend Award on October 9, 2006.

At the 2016 Annie Awards, she and her uncle Jerome Ranft presented her father's posthumous Windsor McKay Award nomination.