Jon Hamm Says His Big Head Is Second Only to Ben Affleck’s “Giant Dome”

Jon Hamm and Ben Affleck pose backstage at The 2013 ESPY Awards
Jon Hamm shared a funny story about his big head -- and how it compares to Ben Affleck's "giant dome" while on Late Night With Seth Meyers Alberto E. Rodriguez/Getty Images

Jon Hamm has earned a lot of attention for one particular body part, but if you ask him, people should be talking about his enormous skull. During an appearance on Late Night With Seth Meyers on Thursday, May 8, the Mad Men star revealed that he very nearly set a record at Saturday Night Live with his sizable noggin.

"I'm sort of known for having a giant head," Hamm, 43, told Meyers, who was a head writer for the comedy sketch show from 2006 until February of this year. "So the first time I went into hair and makeup at SNL, they immediately measure your head because you have to wear wigs and they want to have a mold of your head so all of them fit. So I asked the nice ladies, I said, 'Honestly, I have the biggest head ever, right?'"

In fact, he didn't. "There was one guy—in the history of the show—who had a bigger head than me," the Million Dollar Arm star teased, prompting Meyers to guess which star's cranium topped his. "Ben Affleck has a bigger head than me."

Hamm, who worked with Affleck on 2010's The Town, said he wanted to see exactly how much bigger the Argo director's head is, so he lent the star one of his fitted baseball caps. (Hamm is a devoted St. Louis Cardinals fan.)

"I gave it to him, and it literally sat on top of his head like a little toy hat," Hamm recalled. "I was like, 'That is a giant dome.'"

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