Subsequently, William Wyler chose her to be the lead in Roman Holiday, _________ Gregory Peck. For her role as Princess Ann, she won the 1953 Academy Award for Best Actress and began a string of box office hits.Audrey Hepburn became a goodwill ambassador and spokesperson for UNICEF in 1986. Traveling to areas ___________ famine and devastation, Hepburn worked to raise public __________ of the plight (困境) faced by children in times of crises.