Thorne, who is survived by his wife Linda, and twin daughters Emily and Claire, died on July 8, said the Hollywood Reporter.
The cause of the death is uncertain.
The film and television composer won an Academy award for scoring 'A Funny Thing Happened on the Way to the Forum' and earned a Grammy nomination for writing the incidental score to the 1965 The Beatles starrer 'Help!'. He also received an Emmy nomination for the 1995 CBS TV movie 'A Season Of Hope'.
Thorne was born in England and lived in West Hills, California. He began playing piano at age five and was a professional musician by 15.