CBS' Supergirl has cast its Lucy Lane.

Witches of East End star Jenna Dewan-Tatum has been tapped to recur as the DC Comics character, The Hollywood Reporter has learned.

Born on the planet Krypton, Kara Zor-El (Melissa Benoist) escaped amid its destruction years ago. Since arriving on Earth, she has been hiding the powers she shares with her famous cousin. But now at age 24, she decides to embrace her superhuman abilities and be the hero she was always meant to be.

Set to make her debut in the third episode, Dewan-Tatum will play Lois Lane's younger sister, Lucy. The character is as brash, funny and beautiful as her older sister Lois Lane. Lucy is strong, smart and successful in her own right. She's got a history with Jimmy Olsen (Mehcad Brooks), and she's come to town to right a previous wrong.

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On the drama from executive producers Greg Berlanti, Ali Adler and Andrew Kreisberg, Olsen is a love interest for Kara/Supergirl and works with her at CatCo, the media conglomerate overseen by Cat Grant (Calista Flockhart).

For Dewan-Tatum, the casting marks her return to the small screen following a guest gig on The Mindy Project and starring turn on Lifetime's Witches of East End. The news comes days after the Step Up actress' husband, Channing Tatum, also signed on to star in a comic book property: Marvel's X-Men spinoff movie, Gambit, in which he plays the title character of a mutant who harnesses kinetic energy.

Dewan-Tatum is repped by UTA, Management 360 and Bloom Hergott. She joins a roster of actresses who have played the role, including Elizabeth Barondes and Roxana Zal in Lois & Clark: The New Adventures of Superman and Peyton List (who has moved on to The Flash's Lisa Snart) on Smallville.

Dewan-Tatum becomes the latest addition to Supergirl and joins a roster of guest and recurring castmembers, including Nurse Jackie alum Peter Facinelli as Maxwell Lord, a green tech billionaire who is fascinated with National City's newest citizen: Supergirl; and Sons of Anarchy alum Chris Browning as Ben Krull — otherwise known as villain Reactron.

CBS will launch Supergirl on Mondays — opposite Fox's DC Comics take Gotham. The series will premiere on Oct. 26 at 8:30 p.m. with the prime post-Big Bang Theory debut before moving to its regular slot at 8 p.m. on Nov. 2.