The 22-year-old actress, who has been busy training for her role as the fierce Katniss Everdeen in the second "Hunger Games" film, was photographed kneeling beside the young woman and looked concerned as she spoke to her and waited for help, reported Us magazine.
"The 911 call came in around 6:41 pm on Monday evening. Jennifer Lawrence and some other locals helped a juvenile female who appeared to have been drinking and was outside an apartment building.
"Miss Lawrence and several others waited beside the female until the police and paramedics arrived. It was not serious and the female will be okay. Her name is not being released because of her age," a source said.