More Pics: Ashley Greene Gets VERY Cozy With Joe Jonas At Her Vegas Birthday

The cute couple is all over each other on her big day!

Ashley Greene, 23, celebrated her upcoming birthday with a huge party in Las Vegas — and she couldn’t stop showing PDA with her boyfriend Joe Jonas! Only HollywoodLife.com has the exclusive pics!

The pair started off the night of Feb. 19 with a meal at local hotspot Social House. From there, they hit up Pure nightclub at Caesars Palace, where the real action started!

Joe, 21, snuck into the club ahead of Ashley so the birthday girl could soak up the limelight on the carpet. But once they were inside, the pair was inseparable, showing PDA without a care of who saw them!

It was an incredible night for those two — Joe and Ashley really are one of the strongest couples in Hollywood!

HL