Chris Evans almost "let the cat out of the bag" before popping the question to Alba Baptista!

In a new interview, the Materialists star, 43, shared some details about his proposal to Baptista — whom he wed in September 2023 at a private estate in Massachusetts — and how practice almost made perfect when the big moment finally came.

Speaking with The Knot at the New York City premiere of A24's Materialists on Saturday, June 7, Evans revealed that he proposed to his now-wife in Portuguese, having learned a bit just for the occasion.

"Maybe I shouldn't even be saying this. I proposed to my now-wife in Portuguese — she's Portuguese," Evans said. "So I learned how to say, 'Will you marry me?' in Portuguese. And I had practiced all week."

"I had practiced it so much that, while her and I, I'd be making breakfast and you almost just start saying it out loud and you're like, 'Oh God,' " he added, laughing. "That's not just a song that's stuck in my head, it's gonna let the cat out of the bag."

As Evans explained, he got "really nervous" when it "came time" to ask Baptista, 27, for her hand in marriage.

"I actually think I screwed it up," he said. "But I still know it!"

Evans and the actress were first publicly linked in November 2022, when a source told PEOPLE that they had been together for a year and that their relationship was "serious." The largely private couple made their red carpet debut in 2024 at the Vanity Fair Oscar Party.

Director Jimmy Warden, who worked with Baptista on her new movie Borderline, spoke to PEOPLE about the pair's relationship back in March, when he and his wife, Samara Weaving, shared that they went on a double date with the actors.

"Sometimes you run into people, [and] you're like, 'Oh, this wasn't matchmaking.' You know what I mean? No one was pulling the string. It was just like, 'Oh, these people are exactly right for each other,' " Warden said of the "sweet couple."

"He's also the nicest person," the director added of Evans. "And he's the coolest obviously. He's Captain America."

Evans has previously opened up about expanding his family with Baptista and bringing another dog into their home. He has also previously alluded to becoming a father at some point during a November 2024 interview with Access Hollywood.

"The title of dad is an exciting one," he said, adding that he'd want to be a "superhero" dad.