Actress Peyton List doesn't list her home phone number online or in any way publicly at this time. However, you could try calling her agent at Osbrink Talent Agency at (818) 760-2488. Fan mail can be addressed to: Peyton List, Osbrink Talent Agency, 4343 Lankershim Blvd., Suite 100, Universal City, CA 91602, USA. Unfortunately, there's no guarantee that you will be able to speak to her agent or that she will read your letter.
Peyton List was born in Florida on April 6, 1998 and is best known for playing Holly Hills in the Diary of a Wimpy Kid movie series and Emma Ross in the TV series "Jessie".