Lena Luthor Cast on Supergirl

Katie McGrath, best known for playing Morgana on Merlin, has been cast in the recurring role of Lena Luthor -- Lex's sister -- on The CW's Supergirl, TVLine reports.

In Supergirl, here's how Warner Bros. Television describes Lena: CEO of her family's billion-dollar-tech company, Luthor Corp, which has been tarnished by Lex's evil infamy. Her goal? To re-brand the empire as a force for good. Lena wants to be seen as her own person, separate from her brother. Kara is drawn into Lena's sphere and must determine if she is friend or foe.

Recently, Lena Luthor was reintroduced in the comics. After trying to assassinate her brother, she ended up in a coma. Lex, determined to revive her, has recently started dressing in a blue-and-red power suit and trying to co-opt the Superman name and logo, telling the unconscious Lena that when she recovers, he wants to make her proud of him.

In its second season, Supergirl moves from CBS to The CW, and production heads to Vancouver. One of the highest-rated and most buzzed-about episodes of Supergirl this year was its crossover with The Flash. A move to The CW will mean an increase in crossover opportunities with the DC Universe set up at the network. Supergirl shares executive producers Schecter, Greg Berlanti and Andrew Kreisberg with Arrow, The Flash, and DC's Legends of Tomorrow. A four-way crossover has already been promised for the coming broadcast season.

Chris Woods joins the series in an as-yet-unidentified role from the comics. Besides Woods, Tyler Hoechlin and Ian Gomez have joined the cast as Superman and Snapper Carr, respectively.

Supergirl will air on Mondays at 8 p.m. ET/PT on The CW starting on October 10.