The Brothers Grimm and Scary Movie 3: Dimension Films is rounding out the casts on two of its key projects, enlisting George Carlin and Ja Rule to join Scary Movie 3, and adding Lena Headey, Peter Stormare and Jonathan Pryce to The Brothers Grimm.

Carlin and rapper-actor Ja Rule join a cameo-laden cast for Scary Movie 3, headed by Charlie Sheen and Denise Richards.

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Also appearing are Jeremy Piven, Simon Rex, Pamela Anderson, Jenny McCarthy, Anna Farris, Regina Hall, Anthony Anderson, Leslie Nielsen, Eddie Griffin, Camryn Manheim, Macy Gray, Method Man, Redman and Master P.

Shooting on the David Zucker directed project is due to wrap at the end of this month in Vancouver, with domestic release set for October 3rd.

Headey, Stormare, and Pryce join previously announced leads Matt Damon and Heath Ledger in director Terry Gilliam's The Brothers Grimm, which starts shooting June 30 in Prague.

Scripted by Ehren Kruger (The Ring), the action-adventure fantasy has the legendary German fairytale scribes battling against a real magical curse after a history of trading in hoaxes.

Dimension will release the film in North America, while MGM will handle international distribution.

Stay tuned...