Sienna and Tom Bring Baby Marlowe to Mexico!

Sienna Miller put her bikini body on display during a family vacation in Mexico this week! The actress debuted a new shade of red hair and sported multiple looks, including a black Melissa Odabash two-piece and printed cover-ups, and spent time frolicking in the ocean while her fiancé, Tom Sturridge, stayed on the sand. During their trip, Sienna shared a sweet moment with the couple's 1-year-old daughter, Marlowe, as they waded in the water — how cute is her little sun hat? In addition to their time at the beach, Sienna and Tom took a boat ride with their little one, and we got a glimpse of how mobile little Marlowe is as her mom chased her around the compound where they stayed.

Tom and Sienna are both enjoying some time off after finishing a handful of big-screen projects. Tom stars alongside Christian Bale, Ryan Gosling, and Natalie Portman in a still-untitled Terrence Malick project, and Sienna recently wrapped up Business Trip with Dave Franco and Vince Vaughn as well as the drama Foxcatcher, which reunites her with her GI Joe: The Rise of Cobra costar Channing Tatum.