Chris Klein is an American actor best known for his role as Chris “Oz” Ostreicher in the American Pie film series (1999–2001; 2012). He gained early recognition with the teen comedy franchise and went on to star in other lead film roles such as Here on Earth (2000), Say It Isn’t So (2001), Rollerball (2002), Day Zero (2007), Street Fighter: The Legend of Chun-Li (2009), and Authors Anonymous (2014).

Klein also appeared in notable supporting roles in films like Election (1999), We Were Soldiers (2002), The United States of Leland (2003), Just Friends (2005), and American Dreamz (2006).

On television, he starred as Marty Tanner in the CBS sitcom Welcome to The Captain (2008) and portrayed the villain Orlin Dwyer / Cicada in the fifth season of The Flash (2018–2019). From 2020 to 2024, he played Bill Townsend in the Netflix drama series Sweet Magnolias, and earlier had a recurring role as Drew on FX’s Wilfred (2011–2014).