Sydney Sweeney goes casual with blue Miu Miu sweats for flight out of LA with fiancé Jonathan Davino... after channeling Marilyn Monroe at Vanity Fair Oscars Party

Sydney Sweeney looked as if she was taking it easy on Monday when she jetted out of Los Angeles with her fiancé Jonathan Davino in tow.

The 26-year-old Euphoria star looked casual and comfortable in a luxurious set of gray–blue Miu Miu sweats as she stepped into LAX airport.

The low-key look was a far cry from her elegant ensemble the night before at the Vanity Fair Oscars Party.

She had celebrated the high-profile event in a stunning plunging white gown that channeled the classic glamour of Marilyn Monroe.

Her travel look featured a baggy hoodie from the Italian fashion house that featured unusually long sleeves that threatened to swallow up her hands, as well as oddly long draw strings for the hood.

Sydney Sweeney took it easy on Monday when she jetted out of LA with her fiancé Jonathan Davino. The 26-year-old Euphoria star looked casual and comfortable in a gray–blue Miu Miu sweats as she stepped into LAX airport

She had on a matching set of blue sweatpants, and she continued to rep Miu Miu with a black leather hip bag that she wore slung crossbody style.

The Anyone But You actress carried another larger black back on her shoulder, and she stayed comfortable in a pair of white-and-gray trainers.

Her dirty blond hair, which she cut short for a glamorous bob on Sunday night, was styled in a more relaxed straight style with a middle part.

She completed the causal look with a set of slim black sunglasses that were also from Miu Miu.

Following behind her was her fiancé Jonathan Davino, who wore a black sweatshirt and matching sweatpants, along with a black hooded jacket.

He covered up with chunkier sunglasses and a nondescript black baseball hat that matched his athletic shoes, and he carried a gray–blue suitcase that complemented his fiancée’s sweatsuit, along with a black backpack.

It wasn’t clear where Sydney and her love were heading to after Hollywood’s biggest night, which saw Christopher Nolan’s Oppenheimer take home the top prize for Best Picture at the 96th Academy Awards.

Sydney wasn’t at the actual ceremony, but she lit up the next best thing at the Vanity Fair Oscars Party with her stunning archival Marc Bouwer gown that featured an eye-catching plunging halter neckline.

The cream-colored satin gown was inspired by Marilyn Monroe’s dress in the 1955 Billy Wilder classic The Seven Year Itch.

She wore a hip bag from Miu Miu crossbody-style, as well as white-and-gray trainers and slim black sunglasses that were also from the Italian fashion house

Following behind her was her fiancé Jonathan Davino, who wore a black sweatshirt and matching sweatpants, along with a black hooded jacket

Sydney wasn’t at the Oscars, but she lit up the next best thing at the Vanity Fair Oscars Party with her archival Marc Bouwer gown that featured an eye-catching plunging halter neckline

The cream-colored satin gown was inspired by Marilyn Monroe’s dress in the 1955 Billy Wilder classic The Seven Year Itch (pictured)

The look also paid tribute to a more modern star: Angelina Jolie. The Oscar winner wore the same dress to the 76th Academy Awards in 2004

That comedy features the iconic moment when Marilyn steps over a subway grate just as a burst of air blows her tightly pleated skirt up.

Sydney’s dress featured a similar neckline, though her skirt was much more voluminous.

The look also paid tribute to a more modern star: Angelina Jolie.

The Oscar winner wore the same dress to the 76th Academy Awards in 2004.

‘Thank you @marcbouwer for pulling this iconic dress out of the vault for me, it was an honor to wear a piece of history, and thank you @armanibeauty for letting me play around with your new product,’ Sydney gushed on Instagram on Sunday as she showed off her gorgeous outfit.

Sydney didn’t have any films in contention for the Oscars this year, but she’s a star of the acclaimed HBO series Euphoria, whose third season start date is still up in the air — possibly to the busy schedules and newfound star power of its actors, including Zendaya, Jacob Elordi and Sydney herself.

She also starred late last year in the box office wonder Anyone But You.

The romantic comedy may have helped revive the long-dormant genre, and it proved to be a massive commercial hit for her and her costar Glen Powell.

The film cost only a modest $25 million to make, but it has so far earned a stunning $212 million, according to Box Office Mojo, which is a practically unheard of box office haul for a modern-day rom-com.

Sydney didn’t have any films in contention for the Oscars this year, but she’s a star of the acclaimed HBO series Euphoria and the box office rom-com sensation Anyone But You

Despite getting engaged to Jonathan in 2022, fans wondered if she and her costar Glen Powell were carrying on an affair due to their winning chemistry, though both denied it; seen February 18 in Santa Monica

The film caused some awkwardness for her and Jonathan, as her particularly affectionate demeanor around her costar led some fans to wonder if she had split with her fiancé.

However, she and Glen denied that there was ever a romantic connection between the two, and even poked fun at the idea.

Their winning chemistry was also likely a major factor that drew audiences to see them fall in love on screen after initially meeting as enemies.

Jonathan, a businessman hailing from Chicago, and Sydney were first hit with dating rumors back in 2018, and they got engaged in 2022, though there hasn’t been any hint of an impending wedding since then.