The 47-year-old actor and the Knives Out star were photographed getting very cozy as they enjoyed a barefoot stroll on a beach in Costa Rica on Tuesday. In photos obtained by Daily Mail, de Armas, 31, wearing a burnt orange Cult Gaia dress, nuzzles up to Affleck, who dons a blue graphic tee and black shorts. The photos show Affleck putting his arm around the actress' waist as they lean in close for a kiss.
The two actors, who co-star in the upcoming film Deep Water, have been fueling romance rumors all week. The two were also seen vacationing together in Havana, Cuba, where fans snapped pics and videos of them at a clothing store.
An eyewitness also told ET, "I’m sitting on the floor of the domestic Costa Rica terminal I see a couple come through a very small security making out like arms draped. As soon as I saw him I knew it was Ben."
"They were being very openly affectionate," the eyewitness added. The pair was also photographed together going through a security check at the airport.
Affleck and de Armas co-star in Deep Water, a psychological thriller that follows a well-to-do husband who, after allowing his wife to have affairs in order to avoid a divorce, becomes a prime suspect in the disappearance of her lovers.
ET spoke with de Armas while she was promoting Knives Out, where she opened up about working with Affleck. "It's pretty exciting. I don't think I've ever done anything like it, and it's a genre that I have never played," she shared. "And with Adrian Lyne, who's the master of that genre. I love Ben, and everything's going well, but it's too soon to even know what it's going to be like."