Zendaya may play the leading character on HBO's Euphoria, but Sydney Sweeney is definitely the breakout star. Sure, Zendaya gets a lot of press, especially since she's dating her Euphoria co-star Jacob Elordi, but Sydney's career is skyrocketing like no other.

Related: Jacob Elordi Claims ‘Euphoria’ Co-Star Zendaya Is Like A Sister To Him… But Sources Confirm They’re Dating

Because of Euphoria, as well as her roles in The Handmaid's Tale, Sharp Objects, and in Pete Davidson's Big Time Adolescence, Sydney has grown quite the fanbase. Half of her Instagram followers appear to be thirsty fans of the gorgeous blond, while the rest are blown away by Sydney's incredible style. Regardless, there are a ton of things these fans don't know about the Spokane, Washington native.

10 Euphoria's Cassie Is Credited With Evolving Sydney's Wardrobe

There's no doubt that the internet is home to copious stunning photos of Sydney Sweeney. She's also the face of multiple clothing brands and has a massive Instagram following, most eager for fashion tips. But most of Sydney's style actually doesn't come from her.

Before Euphoria, Sydney wasn't a fan of pink or pastels, but after playing Cassie, she adopted many of these looks into her wardrobe. In fact, she told Instyle that she learned more about her own style through Cassie.

9 Rihanna Handpicked Sydney As One Of Her Brand's Ambassadors

Over the past few months, Rihanna's growing lingerie brand, Savage x Fenty, has been announcing noteworthy models and actors as brand ambassadors. Just recently, we learned that Sydney Sweeney was hand-picked to be one of them. Sydney herself seemed more than pleased with the outcome of her first steamy photoshoot with the megastar's clothing.

During an interview with ET Online, Sydney claimed that Rihanna's people reached out to her personally and even asked Sydney to walk in her show in New York. Unfortunately, Sydney was filming a movie and was unable to walk.

8 She May Be Hiding A Secret Boyfriend

Followers of Sydney Sweeney's Instagram know that she's all about her adopted dog, Tank. During quarantine, there have been copious photos of the two of them together... with little explanation of who is actually taking these photos...

Additionally, Sydney's Instagram has been littered with photos of massive dinners she's been cooking for her and a mysterious roommate. Since Sydney is intensely private, fans have speculated that she actually has a live-in boyfriend.

7 A Titanic Obsession

When she was cast in Once Upon A Time In Hollywood, Sydney was thrilled to be able to be in the same film as Leonardo DiCaprio. This is because she has always had an obsession with Titanic. She told In Style that she adores films that are based on true stories, and the story of Titanic is one of the best; albeit, one of the most tragic.

While she loves Leo, it's Kate Winslet's performance that truly captures Sydney's heart. So much so that she's basically memorized all of her lines from the entire film.

6 She Started A Virtual Book Club On Her Gram

One of the ways that Sydney Sweeney has been occupying her time during lockdown is by starting a virtual book club on her Instagram. This is something that she hoped would bring her fans together during this very trying time.

Sydney told ET Online that she's always been a big reader and wants to inspire others to do the same. For her first book, Sydney chose "We Used To Be Friends" by Amy Spalding. This Young Adult novel blends perfectly with the main fanbase Sydney is growing.

5 Her Callback For Once Upon A Time In Hollywood Was Exceptionally Laid Back

Sydney Sweeney is known for being part of some of Euphoria's most controversial scenes, and that's saying something given the show is full of them. But there's no doubt that her eagerness to take risks landed her a small role in a Quentin Tarantino film.

Related: Once Upon A Time In Hollywood: 15 BTS Facts About The Oscar-Winning Movie

Sydney first auditioned for a casting director, but her call-back for Once Upon A Time In Hollywood took place with Quentin himself, along with 7 or 8 other people. Most of the time the group just ate lunch. Sydney told Chicks In The Office that it was one of the most casual casting experiences she's had.

4 There's A Private Gym On Her Roof

During an interview with ET Online, Sydney explained that she's in a completely different city than the rest of her family. This means that she's been quite isolated from people during the past few months. Luckily for her, she can pass the time by getting into shape on her rooftop.

Sydney often shares images of her and Tank working out on her AstroTurf-covered rooftop in Los Angeles. Her private space is equipped with multiple pieces of equipment that she uses to keep herself in tip-top shape.

3 She Could Basically Have a Career In Fighting

At the age of 14, Sydney Sweeney began taking some pretty hardcore MMA training. In an interview with Marie Claire, the Euphoria starlet said that she even competed in high school. By the age of 18, she had already entered into a grappling tournament against boys who were far above her weight class. And guess what? She took first place.

Related: 16 Successful Fighting Careers Ruined By Self-Sabotage

If Sydney had pursued MMA fighting, there's no doubt that she could have a career in it. At the very least, it will help her if she has to do any action roles.

2 A Business-Oriented Mind Comes Naturally To Her

Sydney grew up with a lawyer mother and a father in the medical field. Because of their more mainstream occupations, they encouraged Sydney to do more than just dream about her love of acting. In fact, it was because of their guidance that Sydney presented a five-year business plan in order to win their support to audition for a movie when she was 12.

According to an interview with MTV, Sydney is also taking business courses as she wants to be able to read every single contract that comes in front of her to make sure she can legally protect herself.

1 Sydney Wants Her Fans To Know That She Doesn't Look As Perfect As She Does On Euphoria

It's pretty easy to understand why so many people either want to be Sydney Sweeney or be with her. She almost always looks ridiculously gorgeous, especially on Euphoria. But the actor told ET Online that she, and the rest of the cast, don't look as perfect IRL.

Not only do Sydney and her castmates get their makeup done by professionals, but HBO also uses CGI to clean their skin up if they have any pimples. In short, don't idolize her for her looks, they're enhanced. As is everyone else's. Sydney is just human.

Next: 15 BTS Facts About HBO’s Euphoria Even The Biggest Fans Don’t Know