"I thought it was gonna be a secret, but she just decided to let the cat out of the bag," the actor jokingly tells Access Hollywood. "I texted with her after. I was like, 'That was hilarious.'"
"The truth is I remember I met her and then she was on a talk show and made up some story that I pretended to avoid her," he says.
"And when I saw her on the red carpet I was like, 'Hey man, you made up some b— story,' and she was like 'Oh I'm sorry,' " Cooper explains with a laugh.
"So maybe she's making up for that now ... cause I called her on it."
Cooper is also busy promoting his new film, Burnt, which hits theaters Oct. 23—and Schumer's first HBO comedy special airs Oct. 17.