Robert Downey Jr and his longtime wife, Susan, were seen arriving to Jimmy Fallon‘s star-studded party, attended by Andy Cohen and Will Arnett, in The Hamptons on Sunday.

While getting ready to mingle with other A-listers at the 48-year-old late-night talk show host’s bash, the Oppenheimer star, 58, was seen walking with his spouse to the event from his car.

For the occasion, the two-time Oscar nominee wore a white and grey pinstriped blazer over a graphic t-shirt and khaki pants.

He completed his look with a pair of prescription glasses and brown and white sneakers.

The actor’s wife, 49, sported a black sleeveless dress, oversized sunglasses and her light brown hair in loose waves.

Dapper: Robert Downey Jr and his longtime wife, Susan, were seen arriving to Jimmy Fallon’s star-studded party, attended by Andy Cohen and Will Arnett, in The Hamptons on Sunday

Ready to party: While getting ready to mingle with other A-listers at the 48-year-old late-night talk show host’s bash, the Oppenheimer actor, 58, was seen walking with his spouse to the event from his car

Downey Jr and his wife have two kids: Exton, 11, and Avri Roel, nine.

He also shares a son, named Indio, with his first wife, Deborah Falconer.

The duo appeared in high spirits as they made their way to Fallon’s gathering, which appeared to be a semi-casual affair.

Cohen, best known for his late night talk show, Watch What Happens Live! on Bravo, rocked a purple dinosaur-print, button-up and black shorts.

He also sported a pair of aviators, a black and white patterned bandana and yellow sandals.

The 55-year-old producer carried a gift from the sustainable kids’ clothing brand, Macrae Skye, presumably for Fallon’s 10-year-old daughter.

Fallon and his wife Nancy Juvonen’s little girl was 𝐛𝐨𝐫𝐧 on July 23, 2013 via surrogacy.

Will Arnett and his partner, Alessandra Brawn, were also in attendance with their three-year son, Alexander Denison.

Handsome: For the occasion, the two-time Oscar nominee wore a white and grey pinstriped blazer over a graphic t-shirt and khaki pants

Funky look: Cohen, best known for his late night talk show, Watch What Happens Live! on Bravo, rocked a purple dinosaur-print, button-up and black shorts

Having fun: He also sported a pair of aviators, a black and white patterned bandana and yellow sandals

Thoughtful: The 55-year-old producer carried a gift from the sustainable kids’ clothing brand, Macrae Skye, presumably for Fallon’s 10-year-old daughter

Dad life: Cohen has two kids, a son, named Benjamin Allen, in 2019, followed by daughter Lucy Eve in 2022

In addition to his youngest, Arnett shares two sons Abel and Archie from his past marriage to Amy Poehler.

Brawn, the former CEO of clothing brand Chapel, also has a son, Nash, from a previous relationship.

While Fallon and family were not seen outside the shindig, he recently shared a rare photo with his wife and kids on Instagram.

‘I agreed to take this photo only if I could stand on the dry side of the dock. Happy 2nd of July!’ he captioned the adorable post.

Hanging with the parents: Will Arnett and his partner, Alessandra Brawn, were also in attendance with their three-year son, Alexander Denison

Hands full: In addition to his youngest, Arnett shares two sons Abel and Archie from his past marriage to Amy Poehler

Big family: Brawn, the former CEO of clothing brand Chapel, also has a son, Nash, from a previous relationship

In the photo, the family of four were seen smiling as they posed on a dock with a golden glow by a scenic lake.

Fallon held his younger daughter on his hip while Juvonen, 56, put her arms around the couple’s older daughter.

As explained in the caption, the producer and Winnie stood on the wetter side of the dock for the picture.

In the photo, the Saturday Night Live alum donned a pink collar shirt, a blue under tee, a pair of brown pants, and a pair of white sneakers.

Meanwhile, Juvonen wore a black tee, a pair of black shorts, and pair of yellow platform sandals. She wore her hair down.

Winnie wore a white tee and sky blue skirt that had white and yellow squiggly lines running across the bottom of it.

As for Frances, the younger 𝘤𝘩𝘪𝘭𝘥 donned a white top with ruffle sleeves and a white floral patterned skirt.

Unlike their parents, both of the 𝘤𝘩𝘪𝘭𝘥ren, who were 𝐛𝐨𝐫𝐧 via a surrogate, opted to go barefoot for the picture.

The family spent the Fourth of July weekend at Juvonen’s family house in Lake Winnipesaukee, New Hampshire. It is largest lake in the state of New Hampshire and is situated by the town of Wolfeboro.

Lake Winnipesaukee holds a special place in the couple’s heart as it was the site of where Fallon asked Juvonen to marry him.