Walt Disney Co. is developing films based on "Star Wars" characters, Chief Executive Robert Iger said Tuesday, in addition to the three sequels the company has already said it would make.

Screenwriters Lawrence Kasdan and Simon Kinberg are at work on films centered on characters from the blockbuster science-fiction series, Mr. Iger said in an appearance on CNBC. He declined to elaborate on details such as which characters the films would include or when they would be released.

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