Nicole Kidman Wears Skintight Wetsuit, Frolics in the Ocean With Shirtless Keith Urban: Pictures

USMagazine, Tuesday, February 19, 2013, 2:30pm (PST)

Six-and-a-half years in, the honeymoon is far from over! Not-so-newlywed couple Nicole Kidman and Keith Urban couldn't keep their hands off each other during a recent trip to a beach in Sydney, Australia. And it's not difficult to see why.

PHOTOS: Keith and Nicole's sweetest moments

The Paperboy actress, 45, showed off her slim, sexy physique in a skintight pink-and-white Billabong top and white bikini bottoms, while her country-crooner spouse, also 45, flaunted his fit torso and muscular arms in just a pair of swimming trunks. Married since June 2006, the stars looked like two kids in love as they frolicked together in the surf.

PHOTOS: Nicole's style evolution

Several days later, on Valentine's Day, the lovebirds enjoyed a romantic dinner at West Hollywood eatery Eveleigh, which shares a name with an inner-city suburb of Sydney and is owned by a fellow Australian. There, the couple holed up together in a corner booth and dined from the restaurant's four-course prix fixe menu, which included dishes from four different countries.

"They were very animated, talking and laughing together the entire meal," an onlooker tells Us Weekly of the lovey-dovey pair. "[It] just looked like they were sincerely enjoying a night out together. You got the sense that they're friends, that they genuinely like each other."

PHOTOS: Hot Aussie celebs

The source adds that the couple's PDA seemed natural. "As they walked out of the restaurant, he said something that made her laugh loudly, and then they walked with their arms around each other," the onlooker tells Us. "They paused by the bar to wait for the host to show them out the side entrance, and he put his hand on her bottom, in a cute way. They stood there, casually hugging, looking very happy."

Kidman -- who was previously married to Tom Cruise, with whom she has two kids, Isabella, 20, and Connor, 17 -- met fellow Aussie Urban in January 2005. They have two daughters together, Sunday Rose, 4, and Faith Margaret, 2.

This article originally appeared on Usmagazine.com: Nicole Kidman Wears Skintight Wetsuit, Frolics in the Ocean With Shirtless Keith Urban: Pictures