With Georgia O'Keeffe-mania sweeping the nation, actress Joan Allen, who plays the artist in the late September Lifetime biopic, was the lead guest on Tuesday's episode of Late Night with Jimmy Fallon. Fallon admitted to not knowing much about the artist, including how she acted or spoke. "I never actually got footage to hear how she talked, except as an older woman," said Allen. That gave Fallon an idea. "It kind of gives you creative license. You can make her sound like whatever you want," he said.