Maggie Grace joins Twilight finale…

Maggie Grace has joined the cast of The Twilight Saga: Breaking Dawn.

The Lost star has signed on to play Irina, the Denali vampire who mistakenly outs Edward and Bella’s baby Renesmee as an immortal child.

The first instalment of Breaking Dawn will be released on November 18, 2011, followed by part two on November 16, 2012.