Will was born in Hammersmith, London, England. He has an older brother, Ed, older sister, Jo, and a younger sister, Charlotte. He attends The Harrodian School in Barnes, London.
In 2010, he appeared in the BBC Three pilot, The Fades, a 60 minute supernatural thriller written by Skins writer, Jack Thorne. The pilot has been commissioned to be written as a six-part series under the new title, Touch.
Poulter recently announced that he will begin filming a small British independent film called Wild Bill, directed by Dexter Fletcher, at the end of 2010.
- Comedy Lab - played various characters
- Son of Rambow - Lee Carter
- School of Comedy - various characters
- Wild Bill - Dean
- We're the Millers - Kenny Rossmore
- Plastic - Fordy
- The Maze Runner - Gally
- Glassland - Shane