Bradley Cooper wasn’t the only one who joined Gigi Hadid in celebrating her 30th birthday.

On Friday, April 25—her real birthday is April 23 — the model rang in three decades in New York City, surrounded by a star-studded entourage of relatives and friends, including her sister, Bella Hadid, and actress Anne Hathaway, both of whom were pictured arriving.

Gigi and Cooper, both 50, went hand in hand to the reception at Saks Fifth Avenue. The model donned a white corset tank and leather leggings to the event, while the Maestro star wore a Philadelphia Eagles varsity jacket that he draped over what looked to be a matched, jewel-tone outfit.

The model also wore a band on her ring finger, which fueled engagement speculations. Earlier this year, a source told PEOPLE that the pair is “serious” but not “looking to rush anything.”

Representatives for Gigi and Cooper did not immediately reply to PEOPLE’s request for comment on Saturday, April 26.

Hathaway, 42, came hand in hand with her husband, Adam Shulman. The actress donned a long baby blue jacket, gold shoes, and a matching handbag.

Meanwhile, Bella, 28, came alone in a black, backless capri catsuit. The stunning celebrity accessorized the beautiful one-piece with a red handbag, black shoes, and a leather jacket she carried by her side.

Emily Ratajkowski, Will Arnett, and Gigi’s parents, Yolanda and Mohamed Hadid, also attended the party, which a source described as “an intimate celebration with her family and close friends.”

Shortly after 11 p.m. local time, the party reassembled at Le Chalet, a cocktail bar in the New York City building, to sing “Happy Birthday” to Gigi as she blew out the candles on her cake — but Cooper remained close to the model throughout the night.

“She and Bradley were adorable,” the insider told PEOPLE. “They mingled and had fun, but also kissed every time they got near each other.”

“It was clear that she had a beautiful celebration,” the insider said. “And it was even clearer that she’s incredibly happy with where her life is right now, especially with Bradley by her side.”

Early October 2023 witnessed Gigi and Cooper dining together at Via Carota in New York City’s West Village, sparking the beginning of their love relationship. Gigi subsequently said that they initially met at a backyard birthday celebration for a mutual friend’s child.

In terms of possible wedding bells, the actor — who shares daughter Lea De Seine, 8, with ex Irina Shayk — and Gigi — who has daughter Khai, 4, with ex Zayn Malik — are “serious about each other, but an engagement would be a big step,” a source told PEOPLE in January.

“Neither want to rush anything, but that’s not to say they’re not extremely happy together,” the insider added at the time, adding that “their families spend time together, as do their children. It’s really lovely.”

Regarding how the two impact each other, the source stated, “Gigi has a free-spirited personality, and she brings out the fun side of Bradley.”