Among the actors turning up Tuesday at Rio Hondo College and other locations were Rosario Dawson, Frances Fisher and Josh Hutcherson.
"Free tuition for the public colleges and universities is very important," Fisher said. "The climate - that's the No. 1 issue. And Bernie Sanders is the only candidate in either party who's talking about how dire our circumstances are."
Campuses also deliver the Latino vote and for many, immigration is a personal issue.
"I really hope he helps all the undocumented immigrants in this country, to help them become U.S. citizens," said Ana Galvez, a Rio Hondo student. "Because I have a bunch of family members who are still in fear that they're going to be deported."
The campaign also worked to sign up voters at Cal State LA and UCLA among other campuses.
The Vermont senator himself campaigned in Sacramento Monday night and then in Stockton Tuesday morning in preparation for his battle against Hillary Clinton in the June 7 California primary.