Greg was born and raised in East Sussex, England. He has worked with many of the most prestigious companies in Britain, including The BBC, The Royal Shakespeare Company, The National Theatre and is often seen on stage in the world famous West End. He played Jesus in the 8 part series Jesus: His Life, has filmed opposite Phoebe Waller-Bridge in the hit series Fleabag and played Jake in the critically acclaimed BBC drama Undercover.

Filmography