Norwell’s Jennifer Coolidge , who is reprising her role as Stifler’s mom in “American Reunion,” walked the red carpet for the film’s Hollywood debut Monday. Other familiar faces at the premiere included Tara Reid , Eugene Levy , Jason Biggs , Seann William Scott , Mena Suvari , and a very pregnant Alyson Hannigan . (Hannigan is expecting her second child with her husband, actor Alexis Denisof , who happens to be a graduate of the New Hampshire boarding school St. Paul’s.)