Sydney Sweeney and her longtime boyfriend Jonathan Davino ignited engagement speculations after the "Euphoria" actress was photographed wearing a large diamond ring on her left ring finger. 

The HBO star's sparkler was on full show when she was seen on Monday in Encino, Calif., conversing with a companion. 

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Sweeney looked to be in high spirits and was seen smiling at one point as she took in the sunshine. 

While the big rock was far from casual, Sweeney wore a pink zip-up sweatshirt, black leggings, and Ugg boots. She wore sunglasses and appeared to be makeup-free. 

During her outing, the famed blond actress debuted a new red haircut. 

Sweeney, 24, and Davino, 37, have been dating since 2018, according to Elle magazine. She has a reputation for keeping their connection covert, despite the fact that they have been seen together multiple times over the years. 

The couple was photographed celebrating Davino's birthday at Tao Chicago in 2019 and having a romantic holiday in Hawaii the following year. Last month, the pair appeared ecstatic as they strolled through a flea market in West Hollywood, according to Just Jared. 

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Davino is a Chicago restaurateur that runs the famed Italian restaurant Pompei with his family. 

Sweeney's representative did not immediately reply to a request for comment to confirm the exciting news. 

Sydney Sweeney has became a household name for her role in "Euphoria." She's also quite outspoken for a young star, which garnered her more fans. Recently, she  has criticized the entertainment industry's "double standards" regarding naked scenes. 

The 24-year-old actor has already shared her opinions on the matter, most recently in an interview with The Independent. 

Sweeney indicated in the interview that her performance was frequently disregarded since she "went nude." 

The 24-year-old performer was asked by Cosmopolitan this week about her feelings on naked scenes following the season two finale of the blockbuster HBO drama. 

"There are hour-long compilations of world-famous male actors with nude scenes who win Oscars and get praised for that work. But the moment a woman does it, it degrades them," Sweeney said.

 "There's such a double standard and I really hope I can have a little part in changing that," she said. 

Sweeney, who also plays in the sensual thriller "The Voyeurs" opposite former "EastEnders" actor Ben Hardy, stated that she had no reaction to seeing herself naked on screen: 

Additionally, the actor explored the practicality of naked scenes and said it's not as sensual or romantic as people think. "When you film one of these scenes, it is so technical and so not romantic," she said. "When I saw The Voyeurs for the first time, I wondered if I'd done too much," she added.  

Sweeney remarked in an interview with The Independent that she was "proud" of her work on "Euphoria," regardless of the criticisms it garnered for featuring nudity.