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There is a parallel universe in which Blair Underwood didn’t play hunky sports doctor Robert Leeds on “Sex and the City.”

The 55-year-old actor, who’s been married to Desiree DaCosta since 1994, told Page Six on Monday night that all the credit goes to his wife, who decided he should take the role.

“I wasn’t sure,” he told us during Resident magazine’s January cover party at Gerber Group’s The Crown. “When the offer came in, I mentioned it to my wife and she’s like, ‘No, you need to do that. Why are you even pausing? You want to go do that.’ I thank her for that.”

Page Six previously reported that Underwood is getting lots of “wild” cheers from women during a scene in his Broadway show, “A Soldier’s Play,” in which his shirt is unbuttoned.

“It’s interesting. It’s flattering,” he said of the audience swooning over the scene. He explained in the show his character at that part is breaking the fourth wall during a monologue, talking to the audience.

“So if something happens you can’t ignore it,” he told us. “You have to acknowledge it. So whether I’m in character or not, the character would acknowledge the same thing that he’s getting dressed, there’s a reaction to it, there’s something humorous about it, but you keep on moving.”

Also spotted at the party was his Broadway co-star Jerry O’Connell and wife Rebecca Romijn.