Bo Derek makes a splash!
The 59-year-old actress looked absolutely ageless as she took part in a 3000 meter open water swimming marathon in Greece on Saturday.
Derek had no problem showing off her fit physique in black bikini bottoms and a hot pink rash guard as she walked along the beach.
The 10 star later ditched the backpack and flip flops as she prepared to enter the water.
While the 3000 meter race might seem a little daunting, Derek is no stranger to the water. A southern California native, Derek's a big fan of swimming -- and even credits it for her age-defying figure.
"I have to admit part of my compulsion to do this swim was I want to eat like Michael Phelps," she told ET in 2013. "I mean if you look at all the list of what we can do for exercise and how many calories it burns, swimming's always at the top. So that was one of the reasons I took up swimming again."
"Swimming is good, swimming is really good," she added. "I do recommend it."
See more on Derek's love for swimming in the video below.