Len Sirowitz, an award-winning advertising art director whose creative work in the 1960s included memorable print ads for the Volkswagen Beetle — like one declaring, “Ugly is only skin-deep” — and a campaign for Sara Lee, which introduced “Nobody doesn’t like Sara Lee,  died on March 4 at his home in Manhattan. He was 91.

“It was quite early in my career that I began to realize that my message needed to not only be bold and daring, but it must stem from the truth…and touch people’s emotions,” he told Dave Dye, who runs the advertising blog “From the Loft.”

Mr. Sirowitz was the senior vice president and associate creative director of Doyle Dane Bernbach. During his tenure, he was voted art director of the year several times by Ad Weekly, and was inducted into the Art Directors Club Hall of Fame.