Answer
In the 1956 film Around the World in 80 Days, Niven played the role of Phileas Fogg, an eccentric Englishman who bets that he can circumnavigate the globe in 80 days. Audrey Hepburn played the role of Passepartout, Fogg's French valet. The film was a critical and commercial success, and Niven and Hepburn were nominated for Academy Awards for their performances.