'Walking Dead' Actress Sonequa Martin-Green Is Headed To 'Once Upon A Time'

12/31/2012 04:52 pm ET

Storybrooke's in for a zombie invasion.

According to TVLine, Sonequa Martin-Green -- who plays a prisoner named Sasha on "The Walking Dead" -- has joined the cast of "Once Upon A Time" as a mysterious character named Tamara.

The details of Martin-Green's appearance on the fantastical ABC series have yet to be disclosed, but TVLine reports she's rumored to have a British accent.

In addition to "The Walking Dead," Martin-Green has also appeared on "The Good Wife," "Gossip Girl," "NYC 22" and "Army Wives."

Once Upon a Time returns to ABC on Sunday, Jan. 6 at 8 p.m. ET on ABC.

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