For his performance as Roger Sterling in Mad Men, John was nominated for Outstanding Supporting Actor in a Drama Series in the 2008 Emmy Awards.
His wife Talia Balsam plays his onscreen wife on the AMC series Mad Men.
John cheers for Boston sports teams: Celtics, Bruins, Red Sox, and the New England Patriots.
John read for the audiobook Duma Key by Stephen King.
John was nominated in 2008 for a SAG Award along with his Mad Men castmates for Outstanding Performance by an Ensemble in a Drama Series.
His father is John M. Slattery. He has four older sisters and one younger brother.
His favorite TV show was always Cheers. He always wishes he could have made a guest appearance on the show.
He originally auditioned for the role of Mr. Big on Sex and the City. The casting team liked him but didn't see him as Big so they gave him a different role.
He did a Broadway play called Betrayal with Juliette Binoche and Liev Schreiber.
John was in the Broadway production is The Rabbit Hole which ended on April 2006.
Slattery married actress Talia Balsam on December 30, 1998 on the island of Kauai in Hawaii. They have one child.
In 2000, John starred opposite Sela Ward as a steelworker romancing a movie actress in To Catch a Falling Star (CBS).
He was raised outside of Boston, Massachusetts in Newton and Wellesley.
John graduated with a BFA Degree in theater and drama from the Catholic University of America, Washington, DC.
He offered an hilarious turn as a politician with kinky sex habits dating Sarah Jessica Parker's Carrie in the HBO sitcom Sex and the City in 2000.
In 1993, Slattery made his Broadway debut as a TV show writer patterned on Larry Gelbart in Neil Simon's semi-autobiographical Laughter on the 23rd Floor, which starred Nathan Lane as a Sid Caesar-like star.
In between his 1991 series stints, Slattery began his long and fruitful association with playwright Richard Greenberg, co-starring in the author's play The Extra Man. He subsequently played Charles Van Doren in Greenberg's examination of the 1950's quiz show scandals Night and Her Stars in 1995 and won critical praise in the dual roles of a father and son in Three Days of Rain in 1997.
John has enjoyed a variety of roles on stage, in films and on television. Slattery offered strong support to Nathan Lane in Terrence McNally's Off-Broadway drama The Lisbon Traviata in 1989.
John worked on K-street along with his wife in 2003.
John: I'm not drawn to political roles per se, but people see you in one way and that's the way they want to cast you. I'd like to do something different, actually. I'd like to take a break from wearing a suit and tie. It isn't who I am. I'd like to do dark comedy, someone a little more emotionally available and less pulled together.
John: The fewer people who are allowed to make creative decisions, the better. In the network situation, there are so many decisions that seem so ridiculous. It's not that there aren't any smart people in network TV, but there's so many people paid to make decisions that have no business making them.
John: (on acting in the nude) It was the first job I've ever gotten in New York, with Nathan Lane. You know, it was a big deal. I remember being on a pay phone standing on Eighth Avenue, being told that I got the job and hanging up and saying, "Holy s--t, I have to take my clothes off." It was embarrassing. My father came to see it, and he was sitting in the front row and you could hear him clearing his throat, slinking down in his chair.
John: (on his first Emmy nomination) I was nervous at the prospect of getting up and having to say anything in front of a group of people. Not really nervous, though. It's a pleasant surprise.
John: (on the 60th Annual Primetime Emmys where he's nominated for Best Supporting Actor in a Drama) I don't even know what to expect. The red carpet makes me nervous.
John: (about working on "Mad Men") It's the best job I've ever had! Every time I read a script, [Roger] always has something to say that I can't wait to do.
John: (on playing Roger Sterling in the shortened season one of "Mad Men") I finally find a [role] I want to keep playing and it ends so quickly.
John: (on playing characters with political power) They see you do one thing and think, 'That guy can play a politician!'. It has nothing to do with me. I am not a leader of men.
John: (on playing Dennis Martino on "Ed") Yeah, I play the d--- head who spoils everything, then leaves. But it's perfect for somebody with a short attention span. Signing on to an open-ended TV show scares me.
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