Joe Jonas' girlfriend is celebrating her 24th birthday!

Sources say that Ashley Greene turns 24 on Monday, Feb. 21 and that her boyfriend Joe Jonas will help her celebrate with their friends in Las Vegas this weekend. The party was at Pure nightclub on Saturday, Feb. 19th!

Who will come to the party? Will some of the Twilight stars be there, like Robn and Kristen?Kellan Lutz is one of Ashley’s best friends so he should have been in Vegas to celebrate with Ashley.

We wonder if Joe’s brothers Nick and Kevin will stop by too?!

However the party was, we wish Ashley a very Happy Birthday!!!!!!!!