Peyton and Spencer List gather all their closest friends to celebrate at their home in Los Angeles on Saturday night (4/6/2013).

The now 15-year-old twin actors partied it up with younger brother Phoenix, and pals Stefanie Scott, Ryan Ochoa, Cameron Boyce, Karan Brar, Jaylen Barron, Kaitlyn Dever, Sabrina Carpenter, Ashley Allisyn Arm, Noah Crawford, and Kenton Duty.

“Happy bday @PeytonList you’re a great sister and it’s funny to see how much we’ve grown over the years. I hope you wake up to this love you!” Spencer tweeted the sweet message to Peyton.

Peyton wrote to all her fans, “Thank you all for the sweet birthday tweets!! You’re making my birthday fabulous!”