Pelletier – who plays the Wolfpack's Jared in The Twilight Saga - was picked up by police in December for allegedly urinating openly at LAX.
The 26-year-old Canadian actor initially insisted he was innocent of the public intoxication charge, but TMZ reports that he ultimately pleaded no contest in court.
A Los Angeles court has ordered Pelletier to serve two years of probation as part of his sentence for the offence.
He will also be required to attend 52 Alcoholics Anonymous classes.
Pelletier is best known from his work in The Twilight Saga, but he has also starred in the television series Renegadepress.com and Dinosapien.
Watch a trailer for The Twilight Saga: Breaking Dawn – Part 2 below: