The first set of twins on TV to encourage people to double their pleasure and fun started their lives together in Hammond.
Twin sisters Joan and Jayne Knoerzer, known as the Doublemint Twins, called the Region city home when, in 1959, they signed a contract at age 21 to work for Philip K. Wrigley, hawking the company's Doublemint Gum under the trademark slogan, “Double your pleasure, double your fun.”
The women were professional singers who performed under their mother's maiden name of Boyd.
The sisters appeared side by side in television commercials — on bikes, playing tennis and more — and at live events across America, turning them into American pop culture icons.
The women changed their names after marriage, becoming Jayne Schwartz and Joan Hackett. The twins were granddaughters of Chicago alderman Charles Boyd, who served from 1898-1902.