MyAnna Buring, Mía Maestro, Casey LaBow and Christian Camargo have joined the cast of both The Twilight Saga: Breaking Dawn - Part 1 and The Twilight Saga: Breaking Dawn - Part 2, according to Heat Vision Blog.

The actors will make up the Denali vampire clan, joining Maggie Grace, who, we reported this week, will portray Irinia, one of the three Denali sisters. MyAnna Buring and Casey LaBow will portray the other two Denali sisters, Tanya and Kate. Tanya is said to become a rival to Kristen Stewart's Bella, while Kate has the ability to produce electric current with which she can shock her enemies.

Mía Maestro and Christian Camargo portray the Denali parents, Carmen and Eleazar. The Denali family is said to be the only other family of vampires who refuse to feed on humans for their blood, like the Cullen clan.

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The Twilight Saga: Breaking Dawn - Part 1 is being readied to start shooting in November.