From Slashfilm
Although he’s been busy filming Episode 8, Mark Hamill took some time to appear at the Oxford Union and he said something…well, he said something very interesting. While discussing what it’s like to work with Daisy Ridley, the man behind Luke Skywalker dropped what certainly could sound like a bombshell if taken in the right context:
When the audience reacted with with appropriate gasps, Hamill quickly clarified:
Fan theories concerning Rey’s parentage have pegged Ridley’s Rey as Luke’s daughter since long before the film even began and there is some evidence in Star Wars: The Force Awakens to back this theory up. However, there’s just as much evidence floating around to back up a number of other theories. So while it’s entirely likely that Hamill just accidentally revealed a big Episode 8 spoiler, it’s equally likely that he really was just referring to their off-screen dynamic. So take from this what you will.