Arnett has two older sisters and a younger brother.[36] His father, a graduate of Harvard University and a corporate lawyer, served as the president and CEO of Molson Breweries from 1997 to 2000.[37] Arnett lists Steve Martin and Chevy Chase as his two biggest comic influences.[14] Arnett grew up watching sports in Canada, and is an avid follower of the Toronto Maple Leafs and Toronto Blue Jays.[38]