The American actress, 46, who stars as Claire Sardina in the upcoming musical drama, looked nothing short of sensational in a plunging blue sheer dress as she posed for sweet snaps alongside Hugh, 57, who plays her on-screen husband Mike.
Kate’s show-stopping ensemble featured a daring neckline, long puffed sleeves, ruched detailing at the waist, a dramatic cowl back and a delicate mini train.
Covering her modesty, Kate layered the look with a black triangle bra and silky blue shorts.
The star added inches to her frame with black strappy heels and accessorised with glittering diamond statement earrings.
Meanwhile, Hugh cut a typically dapper figure in a black zip-up jacket, crisp white shirt and black tailored trousers.
The Wolverine actor appeared in high spirits as he and Kate larked about on the red carpet ahead of the screening.
Song Sung Blue is a biographical musical drama based on the true story of Mike and Claire Sardina, a couple who form a Neil Diamond tribute act called Lightning & Thunder.
The movie follows their journey from struggling Milwaukee performers to finding love and success on stage, navigating personal hurdles, including Mike’s troubled past and a serious accident Claire suffers, all while performing Neil Diamond classics.
Kate and Naomi Watts posed together at the Max Mara x Women in Film event in Los Angeles.
It comes 33 years after the blonde beauties — Kate and Naomi, 57 — starred together in the 2003 rom-com Le Divorce.
For her part, the How to Lose A Guy in 10 Days star showed off her impressive abs in a two-piece black co-ord consisting of a crop top and maxi skirt in photos shared on social media.
The fashionista teamed the sexy look with open-toe black heels that revealed her vampy black pedicure.
Meanwhile, Naomi turned heads in a structured, shrunken off-white blazer with sleeves that cropped just above her wrists.
The former co-stars flashed megawatt smiles while embracing inside the glitzy event, held at Chateau Marmont.
Kate shared images from the cocktail party with her nearly 19 million Instagram followers ahead of the weekend.
She was joined by 53-year-old actress Leslie Mann in one snapshot, whose daughter, Maude Apatow, 27, was one of the night’s honorees.
The nepo baby, whose mother is Goldie Hawn, captioned the carousel post, ‘A night out with @maxmara.’
Naomi also shared multiple photos from the evening, beginning with the shot of her and her former on-screen sibling.
The photo of them showed both in matching sunglasses, prompting her to write in the caption, ‘Sunglasses at night. Thanks @maxmara and @marcolin_eyewear for a great evening!’
During the event, Maude, most recognised for her role in the HBO hit series Euphoria, was awarded Max Mara’s Face of the Future honour in recognition of her work as an actress, writer, and director.
Maude has embraced nepotism with her latest project, the movie Poetic License, casting several stars who have had a leg up in the industry owing to their famous backgrounds.
The filmmaker, whose debut role was at age seven in her father Judd Apatow’s comedy The 40-Year-Old Virgin, made her directorial debut with the film, which premiered at the Toronto International Film Festival in September.