Amber Heard and fiance Johnny Depp were spotted kissing passionately on the set of her movie 'The Adderall Diaries' on Thursday afternoon (May 29) in Brooklyn, N.Y.

'The Adderall Diaries' is based on the memoir written by Stephen Elliott, which "centers on the gripping account of a young man (James Franco) navigating the unstable terrain of truth and identity."

The book is about a blocked writer who turns to a murder trial to get himself writing again. He reports on the trial of Hans Reiser, a computer programmer charged with killing the wife he met through a Russian dating service. Fueled by Adderall, Elliott's stream of consciousness writing stirs towards a wide variety of subjects that include his cruel father, Paris Hilton, and S&M.

Franco originally acquired Elliott'sThe Adderall Diaries back in 2010.

Amber Heard is on the cover of W magazine's June/July 2014 issue.

Heard talked about how her engagement with Depp has affected her acting. She said, "I haven't noticed any change in my career. And, for better or worse, I've always had a love life that seemed particularly salacious to some people. Before, it was also seen as unconventional."

Heard also talked about how it's hard to find a good role and how much she enjoyed she particulared enjoyed hers in 'The Rum Diary.'

'It's very hard to find opportunities like that as a young romantic lead," she said. "As a woman, I usually have two options: Sex Object or the Best Friend Who Isn't Sexy. It's not creatively fulfilling to just be sexy. I did nothing to look the way I look. The genetic cards that anyone is dealt are not in their control, so to take pride in my looks would be a mistake. And besides in L.A. there's always someone more beautiful!"

Heard also talked with W magazine about her love of horses, including her horse Arrow. "When I'm in L.A., I come ride her five times a week. No matter how crazy things get, Arrow will immediately get me back to normal."