How old is Peyton List from Jessie? Peyton Roi List is 18 years old (birthdate: April 6, 1998). Some roles that she is known for are Jessie, 27 Dresses, and in the Diary of a Wimpy Kid series. *There are two a…ctresses that are named Peyton List. The older Peyton List was born August 8, 1986). Some roles that she is known for are Mad Men, FlashForward, As the World Turns, and The Tomorrow People.