Mischa Barton is about to get some company. According to Variety, Shantel VanSanten and Helena Mattsson have joined Barton's upcoming Finding t.A.T.u.

The former The O.C. star will play a lonely American teenager stuck in Moscow. There, she becomes obsessed with the pop band t.A.T.u.. The movie is an adaptation of Russian writer A. Mitrofanov's book "t.A.T.u. Come Back.."

Roland Joffe is directing the film. It starts shooting in Moscow later this month. It is unclear which characters in the book VanSanten and Mattsson will be playing.