Antoine-Olivier Pilon plays 15-year-old Steve in Xavier Dolan's Mommy. Shayne Laverdière/Roadside Attractions hide caption

itoggle caption Shayne Laverdière/Roadside Attractions

The documentary Red Army profiles Viacheslav "Slava" Fetisov — one of the most decorated athletes in Soviet history. Slava Fetisov/Slava Fetisov/Sony Pictures Classics hide caption

itoggle caption Slava Fetisov/Slava Fetisov/Sony Pictures Classics

The Imitation Game, starring Keira Knightley and Benedict Cumberbatch, follows the story of mathematician Alan Turing — from his efforts to break Germany's Enigma code during World War II to his conviction for homosexuality. Jack English/Courtesy of Black Bear Films hide caption

itoggle caption Jack English/Courtesy of Black Bear Films

David Oyelowo portrays Rev. Martin Luther King Jr. in Selma. He says his experience growing up in Nigeria, without experiencing being a minority, helped him approach the job of playing such an iconic figure with less baggage than an American actor might. Atsushi Nishijima/Paramount Pictures/AP hide caption

itoggle caption Atsushi Nishijima/Paramount Pictures/AP

Chris Hemsworth plays hacker and furloughed convict Nicholas Hathaway in Blackhat. Frank Connor/Legendary Pictures and Universal Pictures hide caption

itoggle caption Frank Connor/Legendary Pictures and Universal Pictures

Desiree Akhavan plays Shirin in Appropriate Behavior. Akhavan says she chose the name Shirin because it means sweet in Farsi. "Even though she's insane, she has a sweetness," says Akhavan. Desiree Akhavan hide caption

itoggle caption Desiree Akhavan

Robert Duvall (right) was nominated for Best Supporting Actor for his role in The Judge, which also starred Robert Downey Jr. The nomination left many critics scratching their heads. Claire Folger/AP hide caption

itoggle caption Claire Folger/AP