John M. Slattery Jr. (born August 13, 1962) is an American actor and director, best known for his role as Roger Sterling in the AMC drama series Mad Men.
Slattery's other acting credits include a starring role as Ben Bradlee, Jr., in the Best Picture-winning film Spotlight, and the role of Howard Stark in the Marvel Cinematic Universe films Iron Man 2, Ant-Man, Captain America: Civil War, and Avengers: Endgame. He has received four Primetime Emmy Awards nominations and two Critics' Choice Television Awards for Mad Men and was part of the Mad Men ensemble cast that won two SAG Awards.
In 2013, Slattery directed his first feature film, God's Pocket (2014), which he co-wrote with Alex Metcalf. The film, based on a 1983 novel of same name by Pete Dexter, premiered at the 2014 Sundance Film Festival and was picked up for distribution by IFC Films.
He is also known as John M. Slattery, Jr..