Rumer Willis celebrated her 21st birthday — with a little help from Elvis — at TAO at The Venetian in Las Vegas on Saturday night.

The star was joined by parents Bruce Willis and Demi Moore, stepparents Emma Heming and Ashton Kutcher, and boyfriend Micah Alberti for the star-studded event. Rumer’s Sorority Row co-star Audrina Patridge – who brought ex-boyfriend Corey Bohan was also in attendence; as were Holly Madison, Brody Jenner, and Soleli Moon-Frye.

Rumer’s younger sisters, Tallulah, 18, and Scout, 15 stayed for dinner but left the party before the rest of the gang headed upstairs to the club.