Hailee Steinfeld Rings in Her 21st Birthday in Fiery Leather Mini -- See the Red Hot Pics!

Photographer Group/Splash News

Ring the alarms!

Hailee Steinfeld pulled out all the sexy stops to ring in her 21st birthday at West Hollywood hot spot The Nice Guy on Saturday night.

For her big night, the Edge of Seventeen star donned an itty bitty fire engine red PVC mini custom made by David Koma. She accessorized with matching stilettos, finishing her look by wearing her long dark brown waves down and adding a bold red lip.

Hailee Steinfeld at 21st birthday party
Photographer Group/Splash News

The soiree was actually a surprise set into motion by Steinfeld'sPitch Perfect 3 co-stars, Ruby Rose and Rebel Wilson. All three shared Instagram stories and posts of the birthday girl being genuinely surprised to see everyone at the club in her honor, and you can even see Rose and Wilson sweetly push her into the party, but she pauses to give both of her friends hugs before continuing inside.

Hailee Steinfeld surprised at her birthday party
Hailee Steinfeld/Instagram
Hailee Steinfeld hugs Ruby Rose and Rebel Wilson at birthday party
Ruby Rose/Instagram

Steinfeld was joined by plenty of other famous friends at the bash, including Nina Dobrev, Darren Criss, and YouTube stars Lele Pons and Inanna Sarkis.

Darren Criss and Hailee Steinfeld at 21st bday
Hailee Steinfeld/Instagram
Hailee Steinfeld with YouTube stars
Inanna Sarkis/Instagram

Criss showed up to the holiday event in a festive ugly Christmas sweater and later shared a sweet birthday message to his pal alongside a pic of the two from the party.

"I feel like it was just a few months ago I sang at this one’s sweet sixteenth... (yeah, that happened)..." the Glee alum wrote on Instagram. "Happy 21st, dear sweet @haileesteinfeld."

The "Most Girls" singer -- who offiically turned 21 on Dec. 11 -- also shared pics to Instagram of her sweet surprise, including a close-up of that amazing mini alongside her Lyft ride, cupcakes decorated with her likeness and a tiny tequila bottle with a "21" straw in it.

Now that is how you do a 21st birthday!


EXCLUSIVE: Hailee Steinfeld Stuns in Cutout Dress, Dishes on How 'Feelings' Inspired New Single 'Most Girls'

RELATED: Kendall Jenner & Bella Hadid Party at Sea for Hailey Baldwin's 21st Birthday

MORE: Hailee Steinfeld Denies Justin Bieber Dating Rumors, Says They've 'Been Friends for Years'