The singer joined boyfriendLouis Partridgeat the premiere of his filmDisclaimerin Venice.

She wore an understated black floor-length slip dress with ultra-thin spaghetti straps reminiscent of something straight from the 90s.

The Rodarte dress was patterned with flora and fauna silhouettes in a black velvet burnout.

Venice ITALY  Olivia Rodrigo and Louis Partridge attend the 81st Venice International Film Festival.Pictured Olivia…

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She added a turn-of-the-millennium touch with a large black rosette affixed to the center of her neckline.

Louis Partridge and Olivia Rodrigo at the 2024 Venice Film Festival for the premiere ofDisclaimer.

The only hint of color was her red lipstick and her coordinating nail polish.

Venice ITALY  Olivia Rodrigo and Louis Partridge attend the 81st Venice International Film Festival.Pictured Louis…

Louis Partridge and Olivia Rodrigo at the 2024 Venice Film Festival for the premiere ofDisclaimer.

Together, the couple looked like a total blast from the past.