Co-founder with his brother Maurice of the world's largest advertising agency, Saatchi & Saatchi.
He said his life was changed and his path chosen after he saw a Jackson Pollack painting in the Museum of Modern Art.
His family emigrated from Iraq to avoid persecution. He was married to Nigella Lawson from 2003 to 2013.
He was a big admirer of Andy Warhol, and he once collected over a dozen of Warhol's works.