Hillier was born in Kent to Anthony and Susan Hillier as the eldest of three boys. He studied English literature at King's College and then went on to train at RADA from where he went straight into the prestigious BBC production of Great Expectations.
Hillier was born in Kent to Anthony and Susan Hillier as the eldest of three boys. He studied English literature at King's College and then went on to train at RADA, immediately entering the renowned BBC production of Great Expectations.