Milo Ventimiglia is an American actor best known for his role as Jack Pearson in the NBC drama series This Is Us. He has also had roles in films such as Rocky Balboa, Pathology, and Grown Ups. Ventimiglia began his career as a professional actor in the late 1990s, appearing in television series such as The Fresh Prince of Bel-Air, Sabrina the Teenage Witch, and Law & Order: Special Victims Unit.