Levesque, 31, whose credits also include "Stargate Universe" and the upcoming final season of "Orphan Black", will play Guinevere of King Arthur fame in an episode slated to air in late February, reported Entertainment Weekly.
Actress Caity Lotz first spilled the news of her casting on Twitter.
"Looking forward to another week working with these chicks," she wrote along with Levesque's photo with her.
No further information about her character has been revealed, but the Legends paying a visit to the days of the Knights of the Roundtable, promises to be a lot of fun, and may very well delve into some unexpected DC Comics mythology.
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