Seann William Scott is back and better than ever.

After checking into an undisclosed rehab facility in March to address "health and personal issues," the 34-year-old actor's rep tells that Scott recently "completed a successful treatment program."

In fact, "he is looking forward to beginning production next month on American Reunion for Universal Pictures," Scott's rep adds.

The Minnesota native is best-known as Steve Stifler, the crude party boy from the American Pie films. In 2010, he appeared opposite Bruce Willis and Tracy Morgan in Cop Out.