Uma Thurman, 43, flaunted her toned bikini body in a striped two-piece while vacationing with Arpad Busson and her kids -- including baby daughter Luna -- in Saint Tropez Credit:

Uma Thurman's body of work is a marvel -- and her film career's not bad, either. On Saturday, July 6, the 43-year-old actress flaunted her sexy, toned physique while vacationing in Saint Tropez, France, with boyfriend Arpad Busson.

Rocking a striped halter-style bikini top and matching bottoms, the mom of three -- who gave birth to daughter Luna last July -- showed off her toned stomach, strong arms, and lean legs as she and Busson relaxed on a boat together. Her strawberry-blonde hair was pulled back into a messy bun, and her famous face was makeup-free.

The Kill Bill star and her on-again love were accompanied to Saint Tropez by her kids. At one point in the afternoon, the blonde beauty, in a cream-colored pleated dress, was spotted sitting on the boat with baby Luna, 12 months, on her lap.

Thurman and Busson called off their engagement in 2009 but reunited in 2011 and then announced she was expecting in February 2012. Luna (full name: Rosalind Arusha Arkadina Altalune Florence Thurman-Busson) was born five months later in July. The Oscar nominee also has two kids -- Maya, 15, and Levon, 11, with ex-husband Ethan Hawke, whom she divorced in 2004.

Explaining her youngest daughter's mouthful of a name, Thurman told Jimmy Fallon in January that it was Maya's idea. "My daughter came up with the best excuse, which was that I probably wouldn't get to have any more children, so I just put every name that I liked into [Luna's]," the actress said. "We couldn't quite agree on the name, so we call her Luna. She's lucky that way."