The 40-year-old actor emerged with a blue Neoprene flap bag worth over $11,000 after winning the item at The Heart Fund's annual Generous People Gala auction in Cannes.
"Paris was great," an onlooker told People magazine. "She bid on many things, and Leo did too. Both her and Leo were so active during the entire auction. It was really nice to see ... [DiCaprio] was laughing and enjoying himself with friends."
DiCaprio last portrayed real-life stockbroker Jordan Belfort in Martin Scorsese film The Wolf of Wall Street. The actor will next appear in Alejandro Gonzalez Inarritu revenge movie The Revenant with Tom Hardy, Domhnall Gleeson and Will Poulter.