Pioneering US adman Jay Chiat died on Tuesday at the age of 70, following a long battle with prostate cancer.

Chiat’s most recent post was as chairman emeritus of Screaming Media in Manhattan, but he is best known as the founder, with Guy Day, of Los Angeles creative shop Chiat/Day in 1968.

The agency, said Adweek, “ushered in a new era in the industry, grabbing the spotlight away from traditional industry centers like New York and drawing talent and clients into regional outposts like Los Angeles.”

Chiat/Day – now TBWA/Chiat/Day – was named agency of the decade by Advertising Age in 1990, having been responsible for the groundbreaking ‘1984’ ad for Apple Computer and the Energizer Bunny, as well as introducing account planning into the states from Britain.

“It’s a sad day for all his friends and the business,” declared Bob Kuperman, quondam Chiat/Day executive and now chairman/ceo of DDB Worldwide in New York, who hailed Chiat’s “purity, creativity and a genius that isn’t around right now.”

Data sourced from:;; additional content by WARC staff