He was born in Oldham, Lancashire, the son of William and Pamela Biggins. He was brought up in Salisbury, Wiltshire, attended St Probus school where he took elocution lessons and participated in local drama groups. His first lead stage role was at the age of 17 in a Stage '65 production of Molière's Le Médecin malgré lui, leading to work with a local repertory theatre company.
