Milo Anthony Ventimiglia is an American actor. After a series of roles in television series and parts in independent films, he gained international recognition for his roles as Jess Mariano on the television series Gilmore Girls from 2002 to 2006, and as Peter Petrelli on the NBC series Heroes from 2006 to 2010. He currently stars as Jack Pearson on the NBC drama This Is Us. Ventimiglia made his debut as party guest #1 on The Fresh Prince of Bel-Air , eventually being cast in the short-lived Fox series Opposite Sex in 2000. His later roles include Richard Thorne on The WB's The Bedford Diaries, Jake Provesserio on Boston Public, a recurring role as Meg Pryor's love interest on NBC's American Dreams, and Rocky Balboa's son in the sixth and eighth installments of the Rocky series, Rocky Balboa and Creed II .