Marienthal was born on March 6, 1986,to Penny and Joseph. His older brother Harley Cross and younger sister Flora Cross are also actors.[3] Marienthal is Jewish.[4][5]
Marienthal's career started in Bay Area stage theater work, performing in Missing Persons, The Cryptogram, Hecuba, A Midsummer Night's Dream, Every 17 Minutes the Crowd Goes Crazy, and The Life of Galileo.[citation needed]
^Ebert, Roger (August 27, 2015). "'BEE' GIRL CARRIES FILM". Roger Ebert, Flora Cross Interview. Archived from the original on September 12, 2012. Retrieved November 6, 2005.
^ abcdef"Eli Marienthal (visual voices guide)". Behind The Voice Actors. Retrieved December 23, 2023. A green check mark indicates that a role has been confirmed using a screenshot (or collage of screenshots) of a title's list of voice actors and their respective characters found in its credits or other reliable sources of information.