In the 1960s, the critical and box-office success of the films "West Side Story", "Gypsy", "The Music Man", "Bye Bye Birdie", "My Fair Lady", "Mary Poppins", "The Sound of Music", "A Funny Thing Happened on the Way to the Forum", "The Jungle Book", "Thoroughly Modern Millie", "Oliver!", and "Funny Girl" suggested that the traditional musical was in good health, while French filmmaker Jacques Demy's jazz musicals "The Umbrellas of Cherbourg" and "The Young Girls of Rochefort" were popular with international critics. However popular musical tastes were being heavily affected by rock and roll and the freedom and youth associated with it, and indeed Elvis Presley made a few films that have been equated with the old musicals in terms of form, though "A Hard Day's Night" and "Help!", starring the Beatles, were more technically audacious. Most of the musical films of the 1950s and 1960s such as "Oklahoma!" and "The Sound of Music" were straightforward adaptations or restagings of successful stage productions. The most successful musicals of the 1960s created specifically for film were "Mary Poppins" and "The Jungle Book", two of Disney's biggest hits of all time.