LOS ANGELES: A 27-year-old man pleaded not guilty Friday to charges of stalking Hollywood actress Mila Kunis, star of Oscar-winning 2010 movie “Black Swan.”

Stuart Dunn was charged with two counts of stalking despite a restraining order, after being initially arrested in January having broken into a vacant condominium owned by Kunis.

He pleaded no contest in February to unauthorized entry of a dwelling and was ordered to stay away from the 28-year-old actress, but was arrested again on May 4 after turning up three days in a row at the actress's gym.

Dunn faces up to four years in jail if convicted, and will appear in Los Angeles Superior Court on May 31 for a further preliminary hearing.

Kunis rose to fame in the comedy “That '70s Show” before launching a film career which has included “Forgetting Sarah Marshall,” “Friends with Benefits, and “Black Swan.”She won a Golden Globe last year for best supporting actress in the ballet-themed thriller, whose main star Natalie Portman won the best actress Academy Award.

Kunis also provides the voice of Meg in the animated television comedy “Family Guy.”