Career
He is best known for portraying Gregory Goyle in all of the Harry Potter films. Herdman was born in Hampton, London. The son of actor Martin Herdman and Jessica Herdman, the youngest of the four brothers.
Herdman started acting when he was about seven years old and one day Martin found him an agent.
Herdman also had a child with his partner, Jessica - the couple had a son, Morgan.