Lovato (who uses she/they pronouns) donned a black and white gown and paired the look with a bold red lip and a slicked-back hairstyle featuring short waves, while Jutes sported a black suit and tie.
According to JustJared, the two lovebirds shared a kiss on the carpet.
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Lovato first went public with the musician in August 2022 when they were photographed in New York leaving LAVO restaurant.
At the time, a source previously confirmed exclusively to PEOPLE that Lovato had been quietly dating someone new.
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"It's a really happy and healthy relationship," said the source. "He's a super great guy."
In August, a second source told PEOPLE: "Demi feels happy and fulfilled right now. Life is good. [Jutes'] encouragement and respect have helped her immensely."