The “Star Wars” franchise — now 43 years young — is full of secret cameos, soon-to-be-famous actors in small bit parts, and well-known faces behind alien masks and makeup. Here are 34 big names hidden throughout the franchise you might not have known about, up to and including “Star Wars: The Rise of Skywalker.”

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John Ratzenberger (“The Empire Strikes Back”)

Ratzenberger is best remembered as know-it-all postman Cliff Clavin from “Cheers,” or maybe his numerous voice roles in Pixar movies. In “The Empire Strikes Back,” Ratzenberger is one of the Rebel officers hanging around Echo Base on Hoth with Princess Leia and C-3PO (Anthony Daniels).

Treat Williams (“The Empire Strikes Back”)

When you’re Treat Williams, you can wander onto the set of “The Empire Strikes Back” and find yourself in the movie. Williams reportedly dropped by England’s Elstree Studios set, where the movie was being filmed, to visit Carrie Fisher. Apparently one thing led to another, and now Williams plays one of the Rebel troops running around Echo Base on Hoth.