Sydney Sweeney went old Hollywood glamour at the Los Angeles premiere of her new movie The Housemaid on December 15.The actress wore a plunging white gown from Galia Lahav that was reminiscent of Marilyn Monroe’s iconic look in 1955’s The Seven-Year Itch.Later in the evening, Sweeney changed into a strapless white minidress for the premiere’s afterparty.
In a look reminiscent of Marilyn Monroe’s iconic plunging white gown in 1955’s The Seven-Year Itch, Sydney Sweeney channeled old Hollywood glamour at the Los Angeles premiere of her latest film The Housemaid on December 15.
Sweeney’s custom white gown was designed by bridal designer Galia Lahav, the brand tells InStyle. Made of silk chiffon, the dress featured a draped halter neckline and feather detailing along the hem, “adding movement and a touch of Marilyn-era sensuality,” according to the brand.
Sydney Sweeney in Los Angeles on December 15, 2025.
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Sweeney wore her blonde hair in waves cascading down her shoulders, wearing a bold pop of red lip, a statement bracelet, and diamond earrings. For the afterparty at Tao, Sweeney changed into a strapless white minidress with appliqué flowers, where she posed alongside co-star Amanda Seyfried.
Sydney Sweeney and Amanda Seyfried on December 15, 2025.
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Seyfried told Who What Wear for its December cover story that she feels “protective” over Sweeney, particularly with criticism leveled Sweeney’s way in the public eye.
“She’s got it so much harder than I ever did—not even close,” Seyfried said. “She’s got a spotlight on her that I never had, never wanted. I can’t help but feel somewhat protective of her, though she doesn’t need my protection.”
Sydney Sweeney at the Los Angeles premiere of ‘The Housemaid’.
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Seyfried added that “I don’t know how I would have fared” if social media had existed when she was coming of age in Hollywood. “She’s gonna continue to make choices in her career that I think will define, or at least solidify, her as an actual actress, because people are too distracted by all the other shit that is created around her,” Seyfried continued.
Sydney Sweeney.
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Sweeney herself addressed being underestimated back in October, when she spoke onstage at Variety’s Power of Women event at the Beverly Hills Hotel. “I know what it feels like to be underestimated, to have people define you before you’ve had a chance to define yourself,” Sweeney said. “I know what it feels like to have to prove that you deserve to be here, to be seen, to be taken seriously.”
Sydney Sweeney on December 15, 2025.
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She added, poignantly, that “strength doesn’t look loud sometimes, and sometimes it’s just about getting back up again and again, no matter who’s watching.”