What was Vivien Leigh's film debut?

There seems to be some confusion as to what Vivien Leigh's feature film debut was (or it could just be me, confused that is). imdb has "Look Up and Laugh" as her first listed film, while one of the user maoni says it was "The Village Squire". Then I went to Wikipedia, which says that her first film role was a small role in "Things Are Looking Up". Then some sites are saying this film was released in 1934 and others are saying 1935. So which is right? Maybe someone could shed some light on this swali and come up with a concrete answer.