Dean was born and raised in Pontypool, South Wales, and trained at Mountview Academy of Theatre Arts.
Theatre credits include: ensemble and cover Sam/Bill/Harry in Mamma Mia! (Novello Theatre and international tour); Frex and cover Wizard/Dr Dillamond in Wicked (international tour); Man in Elegy of a Lady Theatr Clwyd; Gordon Mills in Tom - the Musical (original UK tour); Rebel Leader and cover Pop/Khashoggi in We Will Rock You (European arena tour, Dominion Theatre and original UK tour); Reuben and cover Pharaoh in Joseph and the Amazing Technicolor Dreamcoat (UK tour) and Jack Chesney in Charley’s Aunt (CMC).