Castle's Stana and Molly to Voices to Superman:Unbound

I don't know if you all know this, but our beloved Castle's star Stana Katic and Molly Quinn are are providing voices of Lois Lane (Stana) and Kara Zor-El/Supergirl (Molly) in new animated film called Superman: Unbound which to be release in Summer 2013.