Photos: Billy Unger, Olivia Holt, Trevor Jackson and More Party on the Pier with Mattel

Allisyn Ashley Arm, Olivia Holt, Katherine McNamara, and Stefanie Scott pose for a pic during Mattel’s Party on the Pier over the weekend.

Tons of Disney & Nickelodeon stars gathered at the Santa Monica Pier to help raise awareness and money for Mattel Children’s Hospital UCLA. Stars signed autographs and also manned the booths for a day of fun and even dancing!

Other stars in attendance included Billy Unger, Dylan Riley Snyder, Adam Irigoyen, Trevor Jackson, Skai Jackson, Davis Cleveland, Coco Jones, Brendan Meyer, Cameron Boyce, Karan Brar, and many more.

Click inside for 20+ photos…