X-Files: Every Guest Star Who Later Became Famous Actors

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Many future big stars made guest appearances on The X-Files many years before they became household names. While the two realms are much closer in prestige nowadays, back in the 1990s when The X-Files was at its peak, acting in big-screen movies was still definitely seen as a more important gig than working on a TV show. However, everyone has to start their showbiz career somewhere, and for many, appearing in one-off guest-starring roles, bit parts, or as small supporting characters serves as that way in.

While it was one of the shows that helped ease TV dramas toward more serialized storytelling with its famous alien mythology arc, The X-Files was never still very much a «case of the week» type procedural for most episodes, leaving the door wide open for different guest stars to shine every time out. Whether those guest stars were playing the local law enforcement officers either assisting or getting in Mulder and Scully's way or the villain of the moment, ample opportunities were provided to stand out on The X-Files.

Related: X-Files: Mulder's Confusing Family Tree Explained (Who He's Really Related To)

Presented below are 21 actors and actresses that appeared onThe X-Files either before they were famous or before they finally landed that big role that made them a leading performer. Included among the lot are future sitcom stars, future horror icons, and even future Oscar and Emmy-winners. Here's every X-Files guest star that went on to be a big deal.

Four years before playing Jigsaw in Saw would make him a horror icon, Tobin Bell guest-starred on the season 7X-Files episode «Brand X.» He played a heavy smoker named Darryl Weaver, the only surviving participant of a deadly experiment involving engineered cigarettes.

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