
John M. Slattery, Jr. (born August 13, 1962) is an American actor and director, best known for his roles as Roger Sterling on AMC's series Mad Men, Frank Jaffe in Confess, Fletch, Howard Stark (Tony Stark's father) in the Marvel movie series, Paul LeBlanc on FOX's NEXT, Dwight Eisenhower in Churchill, Lyle Bettencourt on CBS's The Good Fight, Richardson in The Adjustment Bureau, Cravely in Charlie Wilson's War, Bud Gerber in Flags of Our Fathers, Peter Benedict on WB's Jack & Bobby, Roland Yates in Bad Company, Dr. Richard Meyers on Lifetime's sitcom Maggie, FBI Agent Corman in Eraser, and Al Kahn on ABC's Homefront.
He has been married to actress Talia Balsam since 1998 and they have a son, Henry.

Avengers: Endgame
2019 · as Howard Stark

Iron Man 2
2010 · as Howard Stark

Captain America: Civil War
2016 · as Howard Stark

Ted 2
2015 · as Shep Wild

Nuremberg
2025 · as Colonel Burton Andrus

Sleepers
1996 · as Carlson (uncredited)

Ant-Man
2015 · as Howard Stark

Traffic
2000 · as ADA Dan Collier

Eraser
1996 · as FBI Agent Corman

Flags of Our Fathers
2006 · as Bud Gerber

Charlie Wilson's War
2007 · as Cravely

Spotlight
2015 · as Ben Bradlee, Jr.

The Adjustment Bureau
2011 · as Richardson

Gail Daughtry and the Celebrity Sex Pass
2026 · as John Slattery

Mona Lisa Smile
2003 · as Paul Moore

The Station Agent
2003 · as David

Unfrosted
2024 · as Ad Man #2

Underdog
2007 · as Mayor