You can't get an actor to do something that is beyond his range, so you have to be aware of the range of the actor and, if necessary, alter the part to suit the actor.

Early life
Boorman was born in Shepperton Surrey England the son of Ivy (née Chapman) and George Boorman. He was recently divorced. Zardoz (1973) starring Sean Connery was a post-apocalyptic science fiction piece set in the 24th century.