John Travolta and Miley Cyrus attend the premiere of their new film Bolt. The pair are lead characters in the latest Disney 3-D animation movie. Travolta plays a dog who believes he has superpowers and Cyrus his owner Penny. Bolt is accidentally shipped to the Big Apple and must find his way back home to Hollywood. He meets a cat, Mittens, and a hampster, Rhino, as travelling companions Travolta, 54, is best known for Saturday Night Fever, Grease, and Pulp Fiction. His co-star, 15-year-old Cyrus, is the star of the television series Hannah Montana. Cyrus penned the song I Thought I Lost You, which she and Travolta sing together. Susie Essman, who voiced, Mittens, said: "The film is about redemption - learning from each other and trusting your instincts. Good things you want your children to know." Bolt opens in the UK on February 13, 2009.