Talk about a glamorous couple.
The Descendants star, 51, wore white shoes, light blue pants and a blue button-down aboard the boat, while Keibler, 32, looked effortlessly fashion-forward in a turquoise and white jumpsuit and complementary straw hat.
Clooney, of course, hasn't just been vacationing in Europe with his gorgeous girlfriend: The Oscar-winning actor has been heavily involved in President Barack Obama's reelection campaign.
In fact, Clooney's fundraiser last month for Obama brought in a record-breaking $12 million. The political pals aren't all work and no play though. The fellows followed up their fundraiser with a game of hoops.