Britney Spearsmade a surprise appearance at theOnce Upon A Time in Hollywoodpremiere Monday night, and she had a special guest join her — boyfriendSam Asghari!

The appearance marks the couple’s first premiere appearance together, though they were photographed together atlast year’s GLAAD Awardswhen Spears accepted the Vanguard Award, Asghari skipped the red carpet.

On Monday, Spears wore a stunning red midi dress with a tiny cutout in the middle, topping off the look with a glittery silver choker necklace, chunky black heels, and her long blonde tresses in a glamorous up-do. Asghari wore a handsome beige suit with a skinny black tie.

The couple happily posed for photos on the red carpet and even shared a kiss.

A source tells PEOPLE that Spears is “excited for the movie,” which starsLeonardo DiCaprio,Brad PittandMargot Robbie.

Britney Spears and Sam Asghari.Matt Baron/Shutterstock

Britney Spears and Sam Asghari

Britney Spears, Sam Asghari.Britney Spears/Instagram

Britney Spears

Sam Asghari, Britney Spears.Britney Spears/Instagram

Britney Spears

Spears shared the special experience onInstagram, saying in a caption underneath two photos of herself and her personal trainer beau, “Our first premiere ⭐️ ”

While Spears and Asghari’s relationship has been heavily documented on social media, this is one of the few major events the pair has attended. But when they do step out, it certainly makes an impression — Spears’ appearance at the GLAAD Awards last Auguststole the show.

“Britney broke the damn show! Everybody lost their minds!” said hostWanda Sykesafter the pop princess accepted her award at the time, which she was given for promoting equality and acceptance as an ally to the LGBTQ+ community.

Britney Spears, Sam Asghari.Kevin Winter/Getty Images

Britney Spears and Sam Asghari

Most recently, the “Oops I Did It Again” singer has been documenting her summertime adventures with Asghari. Just last week, the mother of two shared a video to Instagramdancing poolside, captioning the post “What a fun summer👙 @samasghari.”

The couple has been busy having fun in the sun this summer, enjoying aromantic vacation in Miamijust last month. Spears also spent sometime with her mom Lynnethis summer in Turks & Caicos.

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Asghari and Spears started dating after meeting on the set of the pop star’s “Slumber Party” music video in 2016, making their relationship Instagram official on New Year’s Day 2017.

source: people.com