Seann William Scott is reportedly doing well after completing a stint in rehab.
The 34-year-old was seen at a script reading for American Reunion in Los Angeles last week, according to the New York Post.
"Seann looked good, and everybody was happy," said a source on the film.
American Pie actor Scott entered a rehab facility in March in order to seek treatment for "health and personal issues". He completed a 30-day treatment programme in mid-April.
American Reunion is the fourth true instalment in the comedy series and the eighth in the franchise. Original cast members Jason Biggs, Alyson Hannigan, Tara Reid, Chris Klein and Shannon Elizabeth have been confirmed for the highly-anticipated sequel, which features a ten-year reunion.
American Pie producer Craig Perry said in 2010 that he hoped to get the original cast together for the fourth film in the series.