P.T. Walkley is a New York City-based singer-songwriter and composer for film and television. He and his live band have opened for Weezer and Coldplay, and have played at music festivals such as All Points West.

He released his first LP as a solo artist, Mr. Macy Wakes Alone, in January 2009, and includes contributions from artists such as Larry Campbell, David Campbell, and Sean Lennon. Walkley has since released two EPs, What's What and The Ghost of Chivalry. Walkley is also part of the musical project The Blue Jackets.

He has scored and written songs for several major motion pictures, including the Edward Burns films Looking for Kitty, The Groomsmen, Purple Violets, and Nice Guy Johnny, as well as the 2005 film Southern Belles, which starred Anna Faris and Judah Friedlander. He composed original music for the Ed Burns/Steven Spielberg TV Series "Public Morals" as well as the Nickelodeon children's television show Team Umizoomi, where he also provides vocals for UmiCar. In 2011, he appeared as lead singer of a band in the film Something Borrowed.

In 2017, he did a music video for Sesame Workshop's Sesame Studios YouTube channel, featuring digital puppet characters called "the Ziggles." In 2021, he wrote the theme song "Hey Gabby!" for Netflix's Gabby's Dollhouse.

He has also composed and licensed music for numerous national advertising campaigns, for clients such as MasterCard, General Electric, Mercedes-Benz, Starbucks, and Macy's.