Nina Dobrev's 21st Birthday Bash

Celebrating with a belated party, Nina Dobrev was looking lovely at her 21st birthday bash at Studio 54 inside the MGM Grand Hotel/Casino in Las Vegas on Saturday night (January 16).

Having turned the all-important 21 on January 9, the "Vampire Diaries" hottie's late night fete happened to fall on the very same day that the popular Sin City nightclub was ringing in its 12th anniversary.

Joining in on the fun were many of Miss Dobrev's co-stars including Kayla Ewell and Candice Accola, as well as Matt Lanter, Benjamin Hollingsworth, Sara Paxton and Sara Canning.

Tweeting during the course of her partying, Miss Dobrev wrote, "What happens in Vegas, stays in Vegas. Unless it's really juicy, in which case I'm totally gonna tweet about it."

Celebrity Gossip

Enjoy the pictures from Nina Dobrev's 21st birthday bash (January 16).