The Hunger Games star began dating the British actor after they met on the set of their 2011 superhero film X-Men: First Class, sparking months of speculation about their relationship.
Lawrence confirmed the romance rumours early this year (Feb12) and now admits she decided to be open about the love affair in order to keep the relationship out of the headlines.
She tells Britain's Daily Telegraph newspaper, "You don't want your relationship to be in the press, but at the same time, and this is only a theory, the more you try and keep it a secret, the more the media tries to crack it open. Maybe there's less pressure if you admit you are dating. Admitting that is just an experiment. I'm going to see how it goes."