Will Arnett was spotted arriving at Gigi Hadid’s 30th birthday party alongside a leggy brunette this Friday night in New York City.

The 54-year-old actor is known to have been dating 38-year-old fashion entrepreneur Alessandra Brawn since 2019, and they share a son called Denny, four.

Alessandra did not appear to be at Will’s side Friday, when he was seen reaching the entrance of Gigi’s fete next to the birthday girl’s influencer pal Leah McCarthy, 30.

Leah strolled up the sidewalk right beside Will as they both swung by Le Chalet in Midtown Manhattan for the star-studded fete.

The party was a font of conjecture, with GIgi wearing a ring on her wedding finger while celebrating with her public boyfriend Bradley Cooper, 50.

Bradley is directing an upcoming comedy movie called Is This Thing On?, in which he will also co-star with Will as well as Laura Dern.

DailyMail.com has contacted Will’s representatives for comment. 

Will Arnett was spotted arriving at Gigi Hadid ‘s 30th birthday party alongside a leggy brunette this Friday night in New York City

Leah sizzled up a storm at Gigi’s party, flaunting her cloven-in-marble midriff and ample cleavage in a plunging black crop top.

Slipping on a thin black jacket to ward off the lingering chill, she showcased her statuesque legs in a sparkly miniskirt and black hose.

Read More Gigi Hadid, 29, is ever the supportive girlfriend as she visits Bradley Cooper, 50, on set of his new film after actor takes solo stroll in New York City

Jazzing up the ensemble with a sumptuous set of jeweled necklaces, she sharpened her features with makeup and balanced expertly on stilettos.

Meanwhile Will cut a more casual figure in a partly tucked-in shirt with jeans, leaving his top few ʙuттons beguilingly undone over his bronzed chest.

Leah enjoys a following of more than 150,000 on Instagram, with celebrity friends including Gigi and Queer Eye star Antoni Porowski. 

Will’s sighting at Gigi’s party comes just over a week after he wrapped production on Bradley’s latest directorial effort Is This Thing On?, via Variety.

The comedy stars Will and Laura as a divorcing couple trying to navigate the new dynamic of co-parenting their children and sharing their friends.

Will himself is known to have been dating Alessandra Brawn, who works in the fashion industry, since 2019, welcoming their son Denny the following year.

Leah strolled up the sidewalk right beside Will as they both swung by Le Chalet in Midtown Manhattan for the star-studded fete

Leah sizzled up a storm at Gigi’s party, flaunting her cloven-in-marble midriff and ample cleavage in a plunging black crop top

The party was a font of conjecture, with GIgi wearing a ring on her wedding finger while celebrating with her public boyfriend Bradley Cooper, 50 

The 54-year-old actor is known to have been dating 38-year-old fashion entrepreneur Alessandra Brawn since 2019; pictured at the Vanity Fair Oscar Party in 2024 

Will used to be married to fellow sitcom star Amy Poehler, with whom he formed a beloved comedy power couple when they tied the knot in 2003; pictured in 2012, the year they split 

Although they have largely kept their relationship out of the public eye, they did pose together at the Vanity Fair Oscar Party in 2024.

Will used to be married to fellow sitcom star Amy Poehler, with whom he formed a beloved comedy power couple when they tied the knot in 2003.

They separated in 2012 and finalized their divorce in 2016, but retained an amicable equation as they bring up their sons Archie, 16, and Abel, 14. 

Amy and Will have refrained from publicly airing out the details of their breakup, though they have been candid about its emotional difficulties.

Will described the split as ‘brutal, brutal, brutal,’ sharing: ‘I was driving to the set one day and I pulled over to the side of the road and cried for an hour,’ to The Guardian.

In her memoir Yes, Please, published in 2014, Amy wrote: ‘I don’t want to talk about my divorce because it is too sad and too personal.’ 

The Parks And Recreation star noted that she prefers to maintain a degree of privacy, explaining that ‘I also don’t like people knowing my s**t.’ 

A few weeks after their divorce was finalized, Will, then 48, was linked to interior designer Elizabeth Law, then 30, whom he was involved with until at least March 2019 when they were glimpsed pᴀssionately kissing out in Los Angeles.