Peyton List was born on August 8, 1986 in Baltimore, Maryland. She began working as a model and actress when she was just eight years old, posing for different ad campaigns and magazine spreads. She also trained as a ballet dancer, studying at the School of American Ballet in New York City, and eventually performing for them on stage.

Her big break came in 2001, when she snagged a role in the daytime soap As the World Turns. She took on the role of Lucy Montgomery, a sheltered child of well-to-do parents who left all that because of misunderstandings with her mother. She inherited the role from Amanda Seyfried, who left because of difficulties between her and the writers. List’s popularity grew, partly because of her pairing with Grayson McCouch, who played bad boy Dusty Donovan. IN 2005, she opted not to renew her contract in order to focus on bigger projects.

After playing several guest roles on television, List got her first regular prime time role. She joined the cast of the drama series Windfall in 2006. The series revolved around a group of people in a small city who win a large amount of money from the lottery; she played one of them, Tally Reida. However, low ratings led to its cancellation about the first season ended its run.

The following year, she joined the cast of the drama series Windfall. She played the role of Cameron Collinsworth, the daughter of cosmetics mogul Duncan Collinsworth (Dylan McDermott). The series received negative reviews and was also cancelled after its first season.

List’s other television credits include guest roles in Smallville, Without a Trace, One Tree Hill, Day Break, CSI: Miami, CSI: New York and Mad Men. Her first film was the 2005 sports biopic The Greatest Game Ever Played, where she starred alongside Shia LaBeouf. In 2009, she was cast in the ABC series FlashForward as Nicole Kirby. When the series was canceled, she accepted a role on Mad Men and later reprised her role as Lucy on Smallville. The next year, she played Erica Harris on the show Hawaii Five-O. In 2013, she became part of the cast of The CW series The Tomorrow People.

The Tomorrow People was cancelled after one season, nevertheless Peyton was cast in another CW superhero series The Flash playing Lisa Snart.  She also had a small arc on the ABC series Blood and oil.

In 2016 she was cast as the female lead in the CW’s frequency reboot which received a series pickup.