O'Casey was Born in Montreal, Canada, to poet father, [[Michael Casey (poet)|Michael Casey, and actress mother, Margaret Sheehy, a Dubliner who had co-starred with the young James Joyce in his first stage role.
O'Casey was at one time a leading ice hockey player in his native Montreal, skills which he was able to put to use during the filming of children's adventure serial The New Forest Rustlers, in which he played the leader of a gang planning to steal a priceless Rembrandt [REF].