They wrote two hugely popular film musicals: Mary Poppins and Chitty Chitty Bang Bang.

NPR: The Brothers Who Made Mary Poppins Sing

The first, Chitty Chitty Bang Bang, opens in New York City April 28.

NPR: The Brothers Who Made Mary Poppins Sing

Originally written as three stories but published in 1964 under the name of Ian Lancaster as one, Chitty Chitty Bang Bang was an instant success.

BBC: Rare Chitty papers go under hammer

Frank Cottrell Boyce has been nominated for a Roald Dahl Funny Prize for Chitty Chitty Bang Bang Flies Again, a sequel to Ian Fleming's 1964 original.

BBC: Chitty Chitty sequel up for comedy writing prize

The book, also called Chitty Chitty Bang Bang, was written by James Bond author Ian Fleming in 1961, while he was recovering from a heart attack.

BBC: Rare Chitty papers go under hammer

Their music often soared within movie scenes, accompanying Mary Poppins as she levitated and Chitty Chitty Bang Bang as the car flew its passengers across the countryside.

NPR: The Brothers Who Made Mary Poppins Sing

Rare original manuscripts from the novel which spawned the hit film and West End musical Chitty Chitty Bang Bang are to go under the hammer at Sotheby's next month.

BBC: Rare Chitty papers go under hammer