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Brooklyn Beckham, Chloe Grace Moretz

Todd Williamson/Getty Images

Some of them are barely old enough to drink legally in the United States, or even vote, but they're young, they're famous, they're hot and they're especially sizzling together.

Case in point: Brooklyn Beckham, the adorable 17-year-old, eldest son of David Beckham and Victoria Beckham, and his girlfriend, actress Chloe Grace Moretz, 19, who made their red carpet debut as a couple last month.

They attended the Hollywood premiere of Moretz's new comedy Neighbors 2: Sorority Rising and all eyes were on them. (Well, also because star Zac Efron did not attend, but that's beside the point.)

"Now, it's out. It's done," Moretz told E! News' Marc Malkin. "Get over it. It's real. We're together and that's it!"

Moretz had actually confirmed her and Brooklyn's relationship status (which is..."in a relationship") a week prior, on Andy Cohen's talk show Watch What Happens Live, following months of speculation the two were dating. Back in September, she had played coy when asked about Brooklyn.

Following their big red carpet debut, the two went on an arguably more age-appropriate, and likely much more fun date—in Disneyland!

Check out more hot young Hollywood couples below: 

Austin Mahone, Katya Henry, PDA

Pichichi / Splash News

Austin Mahone, Katya Henry, PDA

Pichichi / Splash News

Austin Mahone and Katya Henry: The 20-year-old pop singer and 21-year-old fitness model and trainer made their public debut as a couple on a Disneyland date in February.

The two were recently photographed packing on the PDA during a day out at the beach in Miami.

Liam Hemsworth, Miley Cyrus

Backgrid AU / AKM-GSI

Miley Cyrus and Liam Hemsworth: The love story of the 23-year-old pop star and actress and the 26-year-old Hunger Games star is not without its bumps in the road. Bumps in the form of a broken engagement.

The two had met on the set of their 2010 movie The Last Song, began dating and got engaged in 2012. The following year, they broke up and ended their engagement. But earlier this year, they rekindled their romance and sources later told E! News the two had gotten re-engaged.

Miley and Hemsworth have been spotted out together occasionally ever since, sometimes with his family, and she has been wearing what appears to be the engagement ring he gave her the first time. In May, her father Billy Ray Cyrus told E! News, "They're so happy," adding, "If any of my kids decide that they're gonna have a wedding of any kind, whatever role they want me to play, I'll be there."

Vanessa Hudgens, Austin Butler

Fern / Splash News

Vanessa Hudgens and Austin Butler: The 27-year-old High School Musical alum and Grease Live! actress and 24-year-old Zoey 101 alum and The Shannara Chronicles actor have been dating since 2011.

Over the years, the two, who are also big Disneyland fans, have often vacationed together, in places like Hawaii, Miami and an African safari.

In February, a Valentine's Day trip to Sedona, Arizona was slightly marred when Hudgens received a citation for damaging a natural feature on U.S. Forest Service by carving into a red rock wall. Hudgens had posted photos of their trip, including a picture of a the carving, which read "Austin + Vanessa." She paid $1,000 in restitution.

ESC, Bella Hadid, The Weeknd

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Bella Hadid and The Weeknd:

The 19-year-old model and daughter of The Real Housewives of Beverly HillsYolanda Hadid and the 26-year-old Grammy-winning singer, whose real name is Abel Tesfaye, began dating last year.

In February, she posted a sweet Instagram post for her boyfriend's birthday, saying, "Happy birthday to the most humble, kind, hard working man I've ever known! 1 year and you're still my favorite person on the planet. You deserve everything great in life."