Cassian Elwes (born in 1959) is a son of Dominick Elwes and Tessa Kennedy. He is the brother of actor Cary Elwes. He is the stepson of Elliott Kastner, an American film producer.

He began his career in the film industry in the early 1980s, as a producer of small, independent films, making occasional cameos in his productions.

Since 1994, he has been an agent at The William Morris Agency, representing independent films and independent film producers. He is widely regarded as one of the most influential people in the U.S. independent film industry.http://www.filmfestivaltoday.com/article_item.asp?ID=469

Brother of Cary Elwes and Damian Elwes.

His mother is shipping heiress and famed interior designer known professionally as Tessa Kennedy. His father is the late renowned portrait painter Dominick Elwes.

Graduated from the Harrow School in England and attended the University of London.

Joined the William Morris Agency's motion picture division. [1994]

Began his career producing movies. From the 1980s to early 1990s, he became one of the foremost independent producers.

Senior Vice President and Co-Head of the Independent Film Division at William Morris Agency. He is one of the leading agents in the business of independent filmmaking.

Is a distant relative of the famous Archaeologist Lord Carnarvon, and a distant nephew of Henry VIII Tudor, King of England, as well as he is a distant nephew of his third wife, Jane Seymour.

Co-head of William Morris Agency International.

Cousin of actress Amanda Elwes.

Grandson of the Royal portrait painter Simon Elwes.

Lived in the U.S. since 1980.

Stepson of Elliott Kastner.