Officials with the Los Angeles County Probation Department have reached out to the Los Angeles Sheriff's Department for help in locating the 27-year-old Dunn, who made an unauthorized departure from a secured facility at around 8 p.m., Sheriff's Department officials confirmed to ET.
Dunn was being confined at the facility for temporary post-release supervision.
Dunn was arrested twice in 2012 after trying to contact Kunis. His first arrest came in February 2012 when he was found living in an unoccupied condo that the actress owned. Kunis got a restraining order against Dunn, which didn't deter him from attempting to get in touch with her.
Dunn was arrested again in May, which is when prosecutors charged him with stalking and violating a restraining order. He pled no contest and was sentenced to six months in live-in rehabilitation program.
Sheriffs and Probation Department officials are still on the lookout for Dunn.