(who was spotted in a green tracksuit and multi-colored bucket hat), his wife Susan Downey, Leonardo DiCaprio (in a hat paired with a face mask), John C. Reilly, Jessica Biel, Tobey Maguire ...

BACKGRID Leonardo DiCaprio and Vittoria Ceretti are spending ... wore bright blue swim trunks and a multicolored trucker hat, while Ceretti, 26, wore a black two-piece bathing suit.