He attended high school at Saint Sebastian"s School in Needham, Massachusetts, and received a Bachelor of Fine Arts from The Catholic University of America in 1984.
He is best known for his role as Roger Sterling in the Administrative Management College drama series Mad Men. In 2013, Slattery directed his first feature film,, 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 Festival, and was picked up for distribution by International Finance Corporation son
He is one of six children.
Slattery is of Irish descent and was raised Roman Catholic. Slattery said when he was younger he loved both television and movies, staying up late to watch them and making it very hard to wake up in the morning.
As a young boy, he dreamed of being a baseball player. Apart from his role on Mad Men, Slattery is also known for roles such as union organizer First Rate (at Lloyd's) Kahn on Homefront.
Senator Walter Mondale in the Home Box Office miniseries From the Earth to the Moon.
As political adviser Tommy Flannigan in the Home Box Office series K Street. Guest appearances as Will Truman"s brother Sam on Will & Grace. As Michael Cassidy, Amy"s estranged husband, on Judging Amy.
Politician Bill Kelley on Sex and the City.
Principal Dennis Martino on Education And college president Peter Benedict on Jack and Bobby.
In March 2007, he began a series of appearances on Desperate Housewives portraying Victor Language, Gabrielle Solis"s (Eva Longoria) second husband, until his character"s death in Season 4. In December 2009, Slattery appeared on The Colbert Report in a faux commercial advertising gold.
Slattery played Paul Moore, boyfriend of Katherine Watson (portrayed by Julia Roberts) in the film Mona Lisa Smile, and he portrayed Howie in David Lindsay-Abaire"s play, Rabbit Hole.
He had a small part as a teacher in the film Sleepers. He was cast as Bert Miller, father of the leading female character, in Dirty Dancing: Havana Nights, and in The Adjustment Bureau played Richardson, a mid-level agent in the mysterious paranormal agency called the Bureau. Slattery narrates the audiobook version of Don Delillo"s 2007 novel Falling Manitoba, Stephen King"s 2008 psychological horror novel Duma Key, and Ernest Hemingway"s 1929 novel A Farewell to Arms.