Sydney Sweeney marked her 28th birthday with an elaborate space-themed party that took place recently in Hollywood. The Sydney Sweeney birthday party featured a cosmic atmosphere filled with astronaut costumes, celebrity guests, and celestial decorations, creating an unforgettable night.
A Dazzling Intergalactic Fashion Display
The Euphoria star captured attention with a striking silver mini dress adorned with three-dimensional stars, designed by the duo known as The Blonds. This metallic, corset-style gown echoed the exact outfit Britney Spears wore for her 2008 Circus album promotional photos, stirring a wave of nostalgia for many millennials. The dress was originally part of The Blonds’ Spring/Summer 2009 collection, renowned for its extravagant flair, featuring corsets, glitter, and theatrical elements.
Complementing her look, Sweeney wore space-themed high heels crafted by Italian designer Rene Caovilla. The actress’s team, including hairstylist Glen Oropeza, makeup artist Melissa Hernandez, and stylist Molly Dickson, collaborated to perfect her ensemble. She even re-enacted Spears’ iconic pose, sitting on one hip with legs tucked beneath her, mirroring the original photograph.
Celebrity Guests Fully Embrace the Cosmic Vibe
The celebration saw guests fully immersing themselves in the UFO motif, arriving in creative costumes that ranged from NASA astronauts to aliens and characters from Star Wars. Glen Powell, Sweeney’s co-star in Anyone But You, appeared as a NASA astronaut, while Lauren Sánchez chose a complementary silver metallic mini dress. Jeff Bezos sported a navy Blue Origin security jacket, a clever nod to his aerospace company, paired with black pants and boots.

Other attendees showed off green alien makeup and ear accessories or dressed as Men In Black figures. Star Wars fans animated the dance floor while wielding lightsabers, and everyone had a chance to snap photos with someone dressed as Chewbacca. The venue matched the theme with NASA rocket ship displays and vibrant lighting that created a club-like ambiance. The double-tiered cake, designed to resemble a starry sky and topped with planet-like spheres, impressed all present.
Friends Kelley McCartney and Amélie Tremblay joined Sweeney for the candle-blowing portion of the evening, while DJ Diplo provided music from the turntables. Scooter Braun attended the event as well, though he was not visible in Sweeney’s Instagram posts. Sources confirmed their casual dating status in early September.
She’s having fun with Scooter and enjoys dating him,
a source close to the actress told People. The source added that Sweeney
had a great time celebrating her birthday with
Braun, describing him as
easy to be around and an intriguing guy.
Ongoing Focus amid Personal and Professional Changes
The space theme echoed Sweeney’s recent birthday trip to Utah, which she described on social media as a “little trip to Mars.” Although her birthday is officially on September 12, this gathering was a belated but spectacular celebration. After ending her nearly seven-year engagement to Jonathan Davino in March, Sweeney is channeling her energy toward career growth.
According to insiders, Sweeney remains dedicated to her professional aspirations.
She’s been clear about her goals for this year — it’s all about her career. She’s ambitious and very focused. She wants to make the most of every work opportunity that comes her way,
a source revealed to People.
Both Sweeney and Braun were guests at the wedding of Jeff Bezos and Lauren Sánchez in Venice, Italy, in June, where their relationship reportedly began.
The Impact and Anticipation Following the Event
Sydney Sweeney’s star-studded space-themed birthday party offered a glimpse into her vibrant personal life amidst ongoing professional momentum. The blend of celestial décor, iconic fashion choices, and celebrity participation highlights her rising influence in Hollywood circles. This celebration not only reflected her tastes and connections but also suggested a promising year ahead for the actress, characterized by ambition and growth both personally and professionally.
