John M. Slattery, Jr. (born August 13, 1962) is an American actor.

Aside from his current Emmy nominated role as Roger Sterling on AMC's series Mad Men, some of his more notable television roles have included union organizer Al Kahn on Homefront; Senator Walter Mondale in the HBO miniseries From the Earth to the Moon; guest appearances as Sam Truman, Will's brother, on Will & Grace; guest Read more...