Jason Biggs as James „Jim“ Levenstein; Jim and Michelle now have a two-year old son.
Alyson Hannigan as Michelle Flaherty-Levenstein
Thomas Ian Nicholas as Kevin Myers; he is married and works from home as an architect.
Chris Klein as Chris „Oz“ Ostreicher; he has moved to a beach house in Malibu and works as a sportscaster on an NFL show.
Seann William Scott as Steve Stifler
Eddie Kaye Thomas as Paul Finch
Tara Reid as Victoria „Vicky“ Lathum
Shannon Elizabeth as Nadia
Natasha Lyonne as Jessica
Mena Suvari as Heather
Chris Owen as Chuck Sherman
Eugene Levy as Noah Levenstein
Jennifer Coolidge as Jeanine Stifler
John Cho as John
Katrina Bowden as Oz’s girlfriend, an „L.A. party girl type“.
Jay Harrington as Heather’s boyfriend who is a doctor
Zane Wind as Mitch
Charlene Amoia as Kevin’s wife
Dania Ramirez as Trisha; „the ugly duckling nobody noticed in high school who has since grown into a beautiful swan, much to Finch’s delight“.
Chuck Hittinger as Marco; „a jock and a bully who takes his girlfriend for granted“.
Vik Sahay as Stifler’s boss
Ali Cobrin as „the cutest senior in high school looking for the perfect guy to give her virginity to“.
Benjamin Arthur as Chester (via Wikipedia)