Olivia Rodrigo Turns 21 in Plunging Black Gown With Exposed Waist Details

The singer rang in her milestone birthday with a glamorous, edgy look and her celebrity friends by her side.

Olivia Rodrigo.Neilson Barnard/Getty Images

It feels like just yesterday Olivia Rodrigo was singing “I’m so sick of 17,” and now the pop star is 21! The three-time Grammy Award-winning artist just celebrated her milestone birthday on Feb. 20, and we‘re obsessed with her look.

The “Good 4 U” singer donned a plunging halter black mini dress with cheeky waist and hip cut-out details and a completely open back (besides two skinny bejeweled belts secured around her waist). She paired the racy number with diamond hoop earrings, chunky silver rings, flared-heel stilettos, a bold red lip and matching ruby manicure. She rocked a full glam moment, including fierce winged eyeliner, feathered brows and a glass skin base, and her long dark brown locks were tossed up into a floppy and intentionally-tousled bun with a few face-framing pieces left loose.

The whole look screamed “main character,” “center of attention” and “21st birthday” in the best way possible.

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“today is my last day of being able to underage drink (hypothetically) !!!!” the California native captioned the carousel that she shared with her 36.5 million followers.

“HBD liv 💜,” the official Facebook account commented.

“Birthday liver,” Iris Apatow, who was featured in the photos, wrote.

“happy birthday queen!! 😍,” Spotify wished.

“What’s your first drink gonna be,” Any Gabrielly asked.

“cutie pie angel,” Rachel Zegler gushed.

“Happy Birthday princess ! We love you sm 🍸 🎂 👄,” the official Bratz dolls account chimed.

“turning 21 just in time for guts tour i love 🥹,” someone else added.