Brad Pitt and his handwritten note.

When Kiehl’s collaborated with Brad Pitt on the first-ever beauty product to be Cradle-to-Cradle certified—meaning it creates minimal waste—the company discovered just how diligent the actor is. For its Aloe Vera Liquid Body Cleanser, which debuts in October and supports global eco-initiatives, Pitt helped design the scent and bottle and wrote a note that’s displayed on the label—providing Kiehl’s with a choice of four variations. “He put his signature on the right, on the left; he arranged the letters in different ways,” laughs Roberta Weiss, senior vice president of global marketing.

Pitt: George Pimentel/WireImage; Handwritten note: Courtesy of Kiehls