Sydney Sweeney put her curves on display in a sexy dress after confirming that her breasts are real. Sweeney, 28, looked effortlessly gorgeous in a custom Galia Lahav dress at The Housemaid premiere in Los Angeles on Monday, December 15. Styled by Molly Dickinson, the actress wore a white plunging dress that snatched her waist and pushed her curves together. The number cascaded into a semi-sheer A-line dress finished with a feathered hem. To make the look even more ethereal, Sweeney complemented her dress with a diamond bracelet and matching stud earrings. She added a pop of color to her glam with a bright red lip. The rest of Sweeney's makeup featured pearly eyeshadow, filled-in eyebrows, blushed cheeks and long lashes. Her blonde hair was parted to the side and styled in loose curls with extensions that cascaded down her back. Sydney Sweeney Reveals If Her 'Boobs' Are Real During Lie Detector Test On the red carpet, Sweeney posed with her Housemaid costar Amanda Seyfried. Seyfried, 40, for her part, was red hot in a strapless Monse dress adorned with delicate beading. The number wrapped around her body and was tied in a knot at her hip. Her dress was finished with a thigh-high slit. Seyfried also opted for diamond jewelry, including rings and a statement necklace. She topped off her ensemble with soft glam, including bronzey eyeshadow, pink lips and long lashes. Her hair was also styled in loose curls. Sweeney's sexy outfit comes after she opened up about her breasts earlier this month while taking a lie detector test for Vanity Fair's YouTube channel. While she was hooked up to the machines, Seyfried questioned, "There's been a question on everyone's mind recently, and I just have to ask. Are your boobs real?" Jon Kopaloff/Getty Images for Lionsgate Sweeney, who was confirmed to be telling the truth, replied, "Yes!" The Mamma Mia star then pressed Sweeney and asked if she's "ever had any work done on them." "No, I've never gotten any work done anywhere," Sweeney answered, to which the test administrator confirmed was "truthful." Seyfried then playfully asked her costar if she could "touch" her breasts, which Sweeney had no problem with. While she confirmed that she hasn't gotten any work done on her breasts, Sweeney previously shared that she almost went under the knife. "When I was in high school, I used to feel uncomfortable about how big my boobs were," she told Glamour UK in 2024."I used to say that when I turned 18, I was going to get a boob job to make them smaller." How Sydney Sweeney Overcame Feeling 'Uncomfortable' About Her Breasts The Euphoria actress then shared that her mom, Lisa Sweeney, talked her out of getting a reduction. "My mom told me, 'Don't do it. You'll regret it in college,'" she recalled. "And I'm so glad I didn't. I like them. They're my best friends." Recently, Sydney opened up about feeling uncomfortable in her body while growing up during an interview with Allure earlier this month. When asked what advice she would take from her Euphoria character, Cassie Howard, the actress joked that she wouldn't ever turn to her for advice. "I don't think I would take advice from Cassie, to be honest," Sweeney hilariously said. "I mean, Cassie was way more confident in her self-image than I was in high school. So maybe something like that, but I don't know if I would."