“Eloise,” the beloved children’s book about a mischievous young girl who lives on the “tippy-top floor” of New York City’s famed Plaza Hotel, is being adapted into a live-action movie.

For two months, while making two "Eloise" movies, 10-year-old actress Sofia Vassilieva got to pretend she was the smart and sassy 6-year-old. "Eloise at the Plaza" will air Sunday night on ABC.