premise: Walking on Sunshine is a 2014 British romantic musical comedy-drama film directed by Max Giwa and Diana Pasquini. The film features covers of songs from the 1980s and was released on 27 June 2014. It is also a debut role for singer-songwriter Leona Lewis.
hypothesis: Walking on Sunshine was the debut film for two people.
reason: It said that it was the debut film for one person, but there is no way to know whether it was also the debut film for someone else. It may have been, or not, there is no way to know. One of the actors or writers or someone else may have had this as their first film. 