Bradley Cooper and daughter Lea attend Taylor Swift’s party at her $17M Rhode Island mansion

Daddy duty.

Bradley Cooper took his daughter, Lea De Seine, to Taylor Swift’s star-studded pool party at her $17 million Rhode Island mansion Saturday.

According to photos obtained by the Daily Mail, the “Hangover” actor, 49, and his 7-year-old were spotted standing on the balcony of the “Bad Blood” singer’s pricey vacation home.

Cooper, who shares his daughter with ex Irina Shayk, flashed a big smile as he looked at Lea, who had her hands reaching up to her dad’s chest.

The “Maestro” star dressed casually for the outing, wearing a short-sleeved black shirt and holding a black cap in his hand.

It’s unclear if Cooper’s girlfriend, model Gigi Hadid, was present at the party.

The “A Star Is Born” actor was one of several A-listers at the 11,000-square-foot estate Swift purchased in 2013.

Also in attendance was the Grammy winner’s boyfriend, Travis Kelce, Patrick and Brittany Mahomes, and Swift’s pals Blake Lively and Ryan Reynolds.

According to photos obtained by Page Six, the billionaire pop star could be seen enjoying time on her balcony with the Kansas City Chiefs tight end, the team’s quarterback and one of his two children.

Lively — who has been the center of drama surrounding her latest film, “It Ends With Us” — and her husband, Reynolds, 47, were seen sharing a kiss before entering the mansion.

Travis’ bother, Jason Kelce, and his wife Kylie Kelce and their children also attended the end of summer festivities, per pics obtained by the Daily Mail.

The pool party comes days after Swift wrapped the European leg of her Eras Tour in London.

The “Cruel Summer” songstress and Travis, both 34, were able to spend time together in Rhode Island due to the NFL star’s “long weekend break.”

“[The Chiefs] were off yesterday, today and tomorrow, but he won’t be staying long. [He and Patrick] have to be back tomorrow night for a Monday morning meeting with the team,” a source close to Travis told Page Six exclusively.

The Chiefs’ opening game against the Baltimore Ravens will take place in Kansas City, Mo., on Sept. 5.