John Hamm and Ben Affleck in ‘Gone Girl’.Photo:Charles Sykes/Bravo;ShutterstockJon Hammhad to drop out ofGone Girlbefore it was a Dunne deal.Inan appearanceonWatch What Happens Live withAndy Cohenlast week alongsideMad MencostarJohn Slattery, the actor, 52, revealed that he was almost the subject ofRosamund Pike’s iconic “cool girl” monologue, notBen Affleck.During a segment in which guests answer questions via video chat, two fans asked Hamm to confirm whether he was meant to star as leading man Nick Dunne in the 2014 thriller adapted from Gillian Flynn’s novel of the same name — and Hamm revealed that he was.“Yeah,” he said, finally confirmingPageSix’s 2015 reportabout his almost-role in the David Fincher-directed mystery. “I was down to the very end of that.”“It was meant to be me, but we had to film the continuing adventures of Mr. Draper,” the actor said, referring to hisMad Mencharacter, ad executive Don Draper.Instead of stepping into Dunne’s shoes, the actor continued filmingMad Men, a decision that ultimately earned him an Emmy for outstanding lead actor in a drama series during the seventh and final season of the show, which aired from 2007 to 2015.Hamm also told Slattery and Cohen that the filmmakers were especially “excited” at the prospect of having him on board since he and Dunne both hail from St. Louis.Ben Affleck in ‘Gone Girl’.Merrick Morton/20th Century Fox/Regency/Kobal/ShutterstockThe actor also poked a bit of fun at Boston-born Affleck, 50, for having to wear a St. Louis Cardinals hat in the film. “Poor Ben,” he told theWWHLaudience. “He was not very happy about it.“Hardcore Boston Red Sox fan Affleck actually stalled production on the psychological thriller for several days when Fincher asked him to wear a New York Yankees hat in a scene.Never miss a story — sign up forPEOPLE’s free daily newsletterto stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories.“I said, ‘David, I love you, I would do anything for you,' ” Affleck said in a2014 interview withThe New York Times. “‘But I will not wear a Yankees hat. I just can’t. I can’t wear it because it’s going to become a thing, David. I will never hear the end of it. I can’t do it.’ ““I couldn’t put it on my head,” Affleck admitted.

John Hamm and Ben Affleck in ‘Gone Girl’.Photo:Charles Sykes/Bravo;Shutterstock

John Hamm, Ben Affleck

Charles Sykes/Bravo;Shutterstock

Jon Hammhad to drop out ofGone Girlbefore it was a Dunne deal.Inan appearanceonWatch What Happens Live withAndy Cohenlast week alongsideMad MencostarJohn Slattery, the actor, 52, revealed that he was almost the subject ofRosamund Pike’s iconic “cool girl” monologue, notBen Affleck.During a segment in which guests answer questions via video chat, two fans asked Hamm to confirm whether he was meant to star as leading man Nick Dunne in the 2014 thriller adapted from Gillian Flynn’s novel of the same name — and Hamm revealed that he was.“Yeah,” he said, finally confirmingPageSix’s 2015 reportabout his almost-role in the David Fincher-directed mystery. “I was down to the very end of that.”“It was meant to be me, but we had to film the continuing adventures of Mr. Draper,” the actor said, referring to hisMad Mencharacter, ad executive Don Draper.Instead of stepping into Dunne’s shoes, the actor continued filmingMad Men, a decision that ultimately earned him an Emmy for outstanding lead actor in a drama series during the seventh and final season of the show, which aired from 2007 to 2015.Hamm also told Slattery and Cohen that the filmmakers were especially “excited” at the prospect of having him on board since he and Dunne both hail from St. Louis.Ben Affleck in ‘Gone Girl’.Merrick Morton/20th Century Fox/Regency/Kobal/ShutterstockThe actor also poked a bit of fun at Boston-born Affleck, 50, for having to wear a St. Louis Cardinals hat in the film. “Poor Ben,” he told theWWHLaudience. “He was not very happy about it.“Hardcore Boston Red Sox fan Affleck actually stalled production on the psychological thriller for several days when Fincher asked him to wear a New York Yankees hat in a scene.Never miss a story — sign up forPEOPLE’s free daily newsletterto stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories.“I said, ‘David, I love you, I would do anything for you,' ” Affleck said in a2014 interview withThe New York Times. “‘But I will not wear a Yankees hat. I just can’t. I can’t wear it because it’s going to become a thing, David. I will never hear the end of it. I can’t do it.’ ““I couldn’t put it on my head,” Affleck admitted.

Jon Hammhad to drop out ofGone Girlbefore it was a Dunne deal.

Inan appearanceonWatch What Happens Live withAndy Cohenlast week alongsideMad MencostarJohn Slattery, the actor, 52, revealed that he was almost the subject ofRosamund Pike’s iconic “cool girl” monologue, notBen Affleck.

During a segment in which guests answer questions via video chat, two fans asked Hamm to confirm whether he was meant to star as leading man Nick Dunne in the 2014 thriller adapted from Gillian Flynn’s novel of the same name — and Hamm revealed that he was.

“Yeah,” he said, finally confirmingPageSix’s 2015 reportabout his almost-role in the David Fincher-directed mystery. “I was down to the very end of that.”

“It was meant to be me, but we had to film the continuing adventures of Mr. Draper,” the actor said, referring to hisMad Mencharacter, ad executive Don Draper.

Instead of stepping into Dunne’s shoes, the actor continued filmingMad Men, a decision that ultimately earned him an Emmy for outstanding lead actor in a drama series during the seventh and final season of the show, which aired from 2007 to 2015.

Hamm also told Slattery and Cohen that the filmmakers were especially “excited” at the prospect of having him on board since he and Dunne both hail from St. Louis.

Ben Affleck in ‘Gone Girl’.Merrick Morton/20th Century Fox/Regency/Kobal/Shutterstock

Gone Girl - 2014

The actor also poked a bit of fun at Boston-born Affleck, 50, for having to wear a St. Louis Cardinals hat in the film. “Poor Ben,” he told theWWHLaudience. “He was not very happy about it.”

Hardcore Boston Red Sox fan Affleck actually stalled production on the psychological thriller for several days when Fincher asked him to wear a New York Yankees hat in a scene.

Never miss a story — sign up forPEOPLE’s free daily newsletterto stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories.

“I said, ‘David, I love you, I would do anything for you,' ” Affleck said in a2014 interview withThe New York Times. “‘But I will not wear a Yankees hat. I just can’t. I can’t wear it because it’s going to become a thing, David. I will never hear the end of it. I can’t do it.’ "

“I couldn’t put it on my head,” Affleck admitted.

source: people.com