John Slattery (Roger Sterling)
As Roger Sterling, a senior partner and accounts executive at Sterling Cooper Advertising Agency, John Slattery was a prominent player in Mad Men, notably after the first season. Prior to Mad Men, Slattery starred in movies like Eraser, Traffic, Bad Company, The Station Agent, Mona Lisa Smile, Dirty Dancing: Havana Nights, and Flag of Our Fathers, and in TV shows like Homefront, Party Of Five, Under Cover, Jack & Bobby, Desperate Housewives, and Maggie.
Marvel fans will surely recognize him in the recurring role as Howard Stark, Tony's late father. His first appearance was in Iron Man 2, and he returned to the role in additional MCU movies afterward, including Avengers: Endgame.
During his Mad Men time, Slattery also starred in Reservation Road, Charlie Wilson's War, Iron Man 2, The Adjustment Bureau, and Ted 2. And he directed 2014's God's Pocket. Shortly after Mad Men ended, Slattery appeared in 2015's Best Picture winner, Spotlight. Next, Slattery stars in Fox's upcoming Next.