Peter MacKennan is a puppet builder and puppeteer who has worked with the Muppets on many projects since 1987.
He worked as a Senior Puppet Designer for The Muppet Workshop from 1987 to 1995, winning two Emmy Awards during six seasons of work on Sesame Street, then served as a Design Director and Creative Director in the Global Products Division of Sesame Workshop from 1998 to 2005.
He is a currently a designer and Senior Artist for Puppet Heap.
- Sesame Street (credited seasons 19 to 25)
- Sesame Street, Special
- The Jim Henson Hour: built Beard
- Big Bird's Birthday or Let Me Eat Cake
- The Muppet Christmas Carol: Muppet Workshop Assistant Supervisor
- Stars and Street Forever
- Sesame Street Stays Up Late
- The Animal Show
- Muppet Treasure Island: built Clueless Morgan
- Studio DC: Almost Live
- A Muppets Christmas: Letters to Santa
- The Muppets (2011): Puppet Specialist
- Muppets Most Wanted: Special Effects Senior Technician (puppets)
- The Muppets (2015): Puppet Specialist (episodes 101-108)
- The Muppets Take the Bowl: Puppet Wrangler
- The Muppets Take the O2
- Sesame Street: Arnold Schnuffleupanegger (back)
- Muppets Studios Presents: You're the Director
- Free to Be... a Family
- The Muppets Celebrate Jim Henson
- Sesame Street Jam: A Musical Celebration
- Though never credited as a puppeteer on Sesame Street itself, MacKennan was credited as such in the following Sesame Street home videos:
- Sesame Street Home Video Visits the Hospital
- Rock & Roll!
- Elmo's Sing-Along Guessing Game
- Sing, Hoot & Howl
- Sing-Along Earth Songs
- We All Sing Together
- A New Baby in My House
- Elmo's World: Singing, Drawing & More! (as Peter McKennan)
- Elmo and Friends: Tales of Adventure
- Elmo's Travel Songs and Games
MacKennan was also credited for vocal work on the compilation album Cheep Thrills.