She played the title character in Mary Poppins, which earned her an Academy Award for Best Actress. She also played Queen Clarisse Renaldi in The Princess Diaries and The Princess Diaries 2: Royal Engagement. She later played the Narrator in Enchanted. She also posed as the Blue Fairy in "Where Magic Begins" in the Disney Dream Portrait Series.
She was a guest star in The Muppet Show.
- She also played Maria in The Sound of Music.
- Her role as Mary Poppins from Mary Poppins was spoofed by Genie in the TV series, Aladdin.
- She provided the whistling for the audio animatronic bird in the song Spoonful of Sugar.
- Walt Disney choose her for the role of Mary Poppins for her ablity to whistle.