Before it became an Oscar-winning movie, My Fair Lady was a Broadway stage musical starring a young Julie Andrews. However, if Andrews had played Eliza Doolittle on screen, she might not have had the opportunity to take on one of her most iconic roles: Mary Poppins. When the musical was adapted into a movie, Andrews was passed over for the lead in favor of movie star Audrey Hepburn, even though Hepburns singing voice was dubbed over.

In the same year as her My Fair Lady disappointment, Walt Disney offered Andrews the chance to lead the cast of Mary Poppins, his upcoming musical project. My Fair Lady and Mary Poppins were both huge hits in 1964, competing against each other in major Oscar categories, although not Best Actress. Over time, Mary Poppins garnered a more lasting impact on pop culture, remaining one of Julie Andrews' best movies from her incredible career that would go on for decades.