Minded Professor (1961), both starring Fred MacMurray. Disney also made several live-action films based on children's books including Pollyanna (1960) and Swiss Family Robinson (1960). Child actor Hayley Mills starred in Pollyanna, for which she won an Academy Juvenile Award. Mills also starred in five other Disney films, including a dual role as the twins in The Parent Trap (1961). Another child actor Kevin Corcoran was a prominent figure in many of Disney's live-action films, first appearing in a serial for The Mickey Mouse Club, where he would play a boy named Moochie. He worked alongside Mills in Pollyanna, and starred in features such as Old Yeller (1957), Toby Tyler (1960), and Swiss Family Robinson. In 1964, the live action/animation musical film Mary Poppins was released and became the year's highest-grossing film. It won five Academy Awards, including Best Actress for Julie Andrews as Poppins and Best Song for the Sherman Brothers', who also won Best Score for the film's "Chim Chim Cher-ee". Throughout the 1960s, Dean Jones, whom The Guardian called "the figure who most represented Walt Disney Productions in the 1960s", starred in ten Disney films, including That Darn Cat! (1965), The Ugly Dachshund (1966), and The Love Bug (1968). Disney's last child actor of the 1960s was Kurt Russell, who had signed a ten-year contract with the company. He featured in films such as The Computer Wore Tennis Shoes (1969), The Horse in the Gray Flannel Suit (1968) alongside Dean Jones, The Barefoot Executive (1971), and The Strongest Man in the World (1975). In late 1959, Walt had an idea to build another park in Palm Beach, Florida, called the City of Tomorrow, a city that would be full of technological improvements. In 1964, the company chose land southwest of Orlando, Florida to build the park and quickly acquired 27,000 acres (10,927 ha) of land for it. On November 15, 1965, Walt, along with Roy and Florida's governor Haydon Burns, announced plans for another park called Disney World, which included Magic Kingdom—‌a larger version of Disneyland‍—‌and the City of Tomorrow, which would be at the park's center. By 1967, the company had made several expansions to Disneyland, and more rides were added in 1966 and 1967, at a cost of $20 million. The new rides included Walt Disney's Enchanted Tiki Room, which was the first attraction to use audio-animatronics; Walt Disney's Carousel of Progress, which debuted at