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Tristin Mays has joined the cast of CBS’s “MacGyver” reboot as a series regular, Variety has learned. With her addition, the show’s principal cast is complete.

Mays — who recently had an arc on “Supergirl” at CBS — will play Riley Davis, a highly unpredictable computer hacker with a chip on her shoulder. Her brain teems with knowledge about computer coding and although she’s “kinda-sorta” pleased to be recruited for MacGyver’s team rather than be locked up in prison, she can’t be bothered to show much gratitude. Her character will first appear in the series premiere on Friday, Sept. 23.

Mays recently had an arc on the CW’s “The Vampire Diaries.” Her other credits include “Switched at Birth,” “The Wedding Ringer” and “Thunderstruck.”

“MacGyver,” which is a new take on the original series, stars Lucas Till in the title role, George Eads, Justin Hires and Sandrine Holt. With Mays, Hires and Holt having joined the show as regulars, “MacGyver” is boasting one of the most diverse casts on CBS’s programming slate.

Peter Lenkov, Craig O’Neill, James Wan, Lee Zlotoff, Michael Clear and original “MacGyver” EP Henry Winkler are exec producers.

Lenkov has reached out to original “MacGyver” Richard Dean Anderson, and the team is eager to get him on board for an appearance, though sources close to the show caution no official talks are happening at the moment.

Mays is repped by Innovative Artists, Luber Roklin and Jackoway Tyerman.