In recent years Ryan Reynolds and George Clooney earned more money from selling their liquor brands, Aviation American Gin and Casamigos tequila, than from their movie deals. Serena Williams and Maria Sharapova, retired from sports, now generate significant earnings through the sale of their apparel and skin care lines, S by Serena and Supergoop. Rihanna and Dr. Dre make millions selling their own brands of cosmetics and lingerie and headphones, respectively.

A version of this article appeared in the May–June 2024 issue of Harvard Business Review.