Wearing a printed bikini top by Piamita x Jo de Mer and tiny shorts underneath a sheer, white shirt, the Oscar winner, 31, hiked around the island and even went for a nice jog during the nature-abundant excursion. Hathaway's famous legs looked leaner and longer in the athletic, revealing outfit.
The Les Miserables star paired her see-through outfit with a bandana headband, aviator shades and hiking shoes during the fitness outing, while her jewelry designer hubby, 32, wore blue shorts, a polo shirt and carried a backpack. The two rested -- momentarily -- during their brisk walk and removed their shoes and socks ahead of a barefoot trek through a stream.
The Dark Knight Rises star and Shulman, who tied the knot in September 2012, landed in Hawaii on Sunday from Los Angeles, and were snapped upon arrival, taking a quiet romantic stroll through Kauai.
This time last year, Hathaway was on the awards circuit for her role as Fantine in Les Miserables. She told Access Hollywood in January 2013 of her post-Les Mis life with Shulman: "We're nesting, playing with my dog -- we're chilling."
She will appear next in the film Don Peyote, opposite Josh Duhamel, Jay Baruchel and Topher Grace.