In January 2008, news about his engagement with Jenny Mollen became public. Actually she is his My Best Friend's Girl co star and they began their love affairs while they were filming in this movie. They finally got married on 23rd of April 2008.
Jason is the graduate of Hasbrouck Heights High School. After that he joined Montclair State University but dropped out from there within three weeks. It is said that he has been active in acting since the age of five. He made his professional acting debut in 1991 and that was in the television series, Drexell's Class. That year he also appeared in the movie The Boy Who Cried Bitch. His break through role came in 1999 after he appeared in the movie American Pie. In 2012, for his role in American Reunion, he earned the salary of $5,000,000. His net worth is said to be around $13 million.