She may have turned 19 last Thursday, but Hayden Panettiere waited until Sunday afternoon (August 24) for her big pool party.

The “I Love You Beth Cooper” babe donned a super sexy gold sparkly two-piece bikini along with a gold “Rockstar” necklace and a big pointed purple party hat.

In related news, Hayden recently spoke out about her father’s arrest and subsequent release on charges of felony spousal abuse, calling the allegations trumped up.

She told press, “It [the incident] was blown way out of proportion by a sheriff who wanted his fifteen minutes of fame. My family is wonderful — so very happy. We’re all great!”

Gossip Girls

Enjoy the pictures of Hayden Panettiere celebrating her 19th birthday (August 24).