Harrison Ford has already said he's interested in reprising his role as Han Solo in the upcoming Star Wars Episode VII, and now his Star Wars co-stars Mark Hamill and Carrie Fisher are looking to revive their characters Luke Skywalker and Princess Leia as well, according to reports.

Hamill tells Entertainment Tonight they've been approached by George Lucas about returning for the upcoming film, though no contracts have been signed. Lucas assured the actors that if they didn't want to participate, their characters would be written out of the film rather than recast, he added.

In talking with Lucas, Hamill told ET he'd prefer that the new trilogy revisit the "carefree and lighthearted and humorous" tone of the original, and that he wouldn't commit to the project unless more of his former castmates did.

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"Are we going to have the whole gang back?" Hamill said. "Is Carrie and Harrison and Billy Dee and Tony Daniels, everybody that's around from the original [returning]? I want to make sure that everybody's on board here, rather than just one."

Hamill said he knows nothing about the plot of Episode VII, but wondered if it may revolve around Luke Skywalker's children.

"It's all very, very exciting and so unexpected," Hamill tells Entertainment Tonight. "It's like getting a pair of pants out of the closet you haven't worn in three years and finding a $20 bill in the pocket. It's just so unexpected."