Rejoice! The Sports Illustrated swimsuit issue is here. And Kate Upton is back on its illustrious cover. Sports illustrated / Yu Tsai This time, she's got not one but three covers. Sports Illustrated / Yu Tsai The theme of this issue? Celebrating "body diversity and age inclusion." Sports Illustrated / Yu Tsai Naturally. The mag also features shots of tennis pro Serena Williams... View this photo on Instagram Instagram: @serenawilliams ...model Ashley Graham... View this photo on Instagram Instagram: @theashleygraham ...and supermodel Christie Brinkley with her daughters Alexa and Sailor. View this photo on Instagram Instagram: @christiebrinkley Another new addition? Model Hunter McGrady, who wrote on Instagram, "I have never felt sexier than I did in this shoot." View this photo on Instagram Instagram: @huntermcgrady "Beauty is not a number. It has no limits." The full issue is on newsstands now.