By | December 06 2012 6:55 PM

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Jon Hamm and Jennifer Westfeldt
Photo: REUTERS

Jon Hamm and Jennifer Westfeldt

"Mad Men" actor Jon Hamm and writer/director/actress Jennifer Westfeldt embarked on a personal and creative partnership in 1997 and have been going strong ever since. “He’s the funniest person I know,” Westfeldt said of Hamm in a June interview with the Huffington Post. “He’s the sweetest guy I know. He’s brilliant. He’s my best friend."

Sarah Michelle Gellar and Freddie Prinze Jr.
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Sarah Michelle Gellar and Freddie Prinze Jr.

They may have played platonic friends in the 1996 horror movie "I Know What You Did Last Summer" but in real life Sarah Michelle Geller and Freddie Prinze Jr. have been happily married since 2002.

Kyra Sedgwick and Kevin Bacon
Photo: REUTERS

Kyra Sedgwick and Kevin Bacon

Married since 1988, Kevin Bacon and Kyra Sedgwick, have one of the longest running marriages in Hollywood. In an April interview with Redbook, "The Closer" star commented on the attention surrounding longtime celebrity couples. "When we're on the red carpet and we get the 'How do you guys do it? No one can stay together,' I get really irritated. I don't think our relationship is more or less difficult; I just think you both make the commitment and you make it work."

Tom Hanks and Rita Wilson
Photo: REUTERS

Tom Hanks and Rita Wilson

Tom Hanks and Rita Wilson, who celebrated their 24th wedding anniversary in April have been married since 1988.

Ben Affleck and Jennifer Garner
Photo: REUTERS

Ben Affleck and Jennifer Garner

Their 2003 film "Daredevil" may have been a disappointment but Ben Affleck and Jennifer Garner's marriage (they wed in 2005) is every bit the picture of perfection. "I could not be luckier," Affleck told "Ellen" of life with Garner and their children in September. "I really have come right to the place where I was supposed to be . . . You've got to knock wood. I've gone around and I've taken some rights and lefts and found myself at a place that is really wonderful, and that I'm really grateful for."

Though celebrity breakups are common, a few Hollywood power couples have managed to survive the 7-year itch.