$8million (£6. 93million) at the time of his death, a fortune which sparked years of fighting between his nearest and dearest.
Duncan showed an interest in the entertainment industry from a young age and his mother Jean, who had similar dreams when she was young, convinced him to move to Los Angeles to pursue a career in acting.
Unfortunately, the Daredevil actor struggled to get work and had to return home when his mother became sick to help support her and his sister.
For a while Duncan worked as a gas man, with an intense physical role as he dug the holes that gave mechanics access to the service pumps.
Read more on msn.com