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32 Stars Who Were on The X-Files Before They Were Famous

David Duchovny and Gillian Anderson weren't the only celebrities on The X-Files, but many guest actors just weren't celebrities yet. The X-Files let fans join Mulder and Scully in the chase for conspiracies, ghosts, and aliens for much of the '90s. Many of the characters they ran into were played by people who would later become famous. The show's helped pave the way for many future stars, as X-Files cameos from future stars were plentiful.

With 10 seasons, including 2016 reboot, X-Files episodes provided plenty of chances for stars to show up as guests. In fact, you'll find household names such as Ryan Reynolds, Jack Black, Brian Cranston, Aaron Paul, and Jane Lynch all appeared on the show. Some of the stars who appeared on the show even owe their careers to their appearance.

The truth is out there, but the 33 stars who made appearances on The X-Files before they hit it big, they're below. 

  • Tony Shalhoub

    You may know him best as the neurotic detective Monk, but it turns out Tony Shalhoub has a shadowy past, having played the creepy Dr. Chester Ray Banton in the episode, "Soft Light."

  • Bradley Whitford

    Before Bradley Whitford spent seven seasons playing Josh Lyman on The West Wing, he was living in a volcano as Dr. Daniel Trepkos in the Season 2 episode "Firewalker."

  • Donal Logue

    You might recognize Donal Logue as Harvey Bullock from Fox's Gotham or Quinn from Blade, but before all that, Logue played F.B.I agent Tom Colton. He first appears in an episode "Squeeze" as a former classmate of Dana Scully. The two cross paths while investigating the supernatural serial killer Eugene Victor Tooms.

  • Felicity Huffman

    Mulder and Scully bring Dr. Nancy Da Silva along for an adventure in the episode "Ice." Emmy-award-winning actress Felicity Huffman played Da Silva in the episode, but you may know her better as Lynette Scavo from Desperate Housewives.