Anne Hathaway and Adam Shulman kiss and cuddle on the subway in New York on July 17, 2012. Credit: XPOSUREPHOTOS.COM

You know what they say: if you see something, say something!

That's just what one commuter did when he spotted Anne Hathaway and her fiance, Adam Shulman, packing on the PDA during a recent subway ride in NYC.

During their trip, the duo stuck close together, sharing several embraces (and more than a few smooches!) in front of their fellow passengers.

Though she rocked low-key threads during her day out with her fiance, Hathaway went totally glam to celebrate the release of The Dark Knight Rises at the flick's NYC premiere. With Shulman by her side, she dazzled in a low-cut, hand-draped Prabal Gurung gown boasting a crystal bodice and peplum waist.

Last November, a rep for Hathaway, 29, confirmed her engagement to Shulman after the Les Miserables star was photographed sporting a stunning diamond sparkler.

"We hit it off immediately, but it took us a pretty long time to get together," the actress has said. Once she ended her four-year romance with Raffaello Follieri in mid-2008 (who pled guilty that October to charges he had defrauded investors of millions of dollars), "things sped up a bit -- and I think I'll leave it at that."

Said Hathaway, "So far, it's worked out great!" adding that Shulman is far more "mellow" than her previous loves.

"Mellow doesn't always make for a good story, but it makes for a good life," she explained.