The Hunger Games star revealed that she struggled with the dance scenes while filming new movie The Silver Linings Playbook.
She told the Daily Mail: "I have two left feet, and I'm not exactly a graceful mover."
The 22-year-old said that she was not confident that the filmmakers would give her the role as she didn't think they would hire a "klutz".
However, she impressed director David O Russell, whose previous credits include Oscar-winning film The Fighter.
He said: "Jennifer did her audition on Skype from her parents' home in Louisville.
"I knew she was Tiffany the moment I saw it. She was funny and she just has a quality about her."
Lawrence plays a grieving widow who helps former teacher/mental institution patient Pat - played by Bradley Cooper - win back his wife on the condition that he partners her in a dance competition.