*Oprah Winfrey and Tyler Perry will team with Lionsgate to help promote its newest film acquisition, "Push."       

       The Lee Daniels-directed film took the Grand Jury Prize and the Audience Award in U.S. Dramatic Competition at last month's Sundance Film Festival. The story follows an overweight, illiterate African-American teen in Harlem who is about to give birth to her second child when she is accepted into an alternative school.       

       "I've never seen anything like it. The moment I saw 'Push: Based on the Novel by Sapphire,' I knew I wanted to do whatever I could to encourage other people to see this movie. The film is so raw and powerful--it split me open," said Winfrey, who will promote the movie through her company Harpo Films. Perry will promote via his shingle, "34th Street Films."        

        The cast includes newcomer Gabourey "Gabby" Sidibe in the lead role, Mo'Nique, Paula Patton, Mariah Carey, Sherri Shepherd and Lenny Kravitz.

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