Lawrence, 22, takes on the role of Tiffany in the movie and credits director David O Russell for helping her to find different sides to her alter-ego, reported Showbizspy.
"It was like a blossoming, growing organism. It's beautiful. Reading the script, I really loved my character, then working with David she slowly started evolving.
"And then finally watching the film, I knew that it would be funny, but I didn't realise it would be as heart-warming, that was something that David did completely on his own. It was this lovely, heart-warming beast and I'd always seen it as sarcastic and a dark comedy kind of thing," she said.
She also enjoyed seeing the relationship with Bradley Cooper's character, Pat, develop as it came alive on-screen.
"I just think that it's a beautiful love story that we really haven't seen, and every scene in the film while we were filming, it just felt so different - it came alive as we were making it.
"I mean, it's beautifully written, but I would have never have guessed that 'Silver Linings Playbook' would end up like it did, it's not what I read," she added.