Original Star Wars actor Mark Hamill has called his return to the franchise after more than 30 years an "unexpected gift".

"It was certainly unexpected. I already had a beginning middle and end. I never thought we'd come back," he told the BBC's Lizo Mzimba.

"To go on to those sets that evoked so many memories. It is just astonishing."

He added that Harrison Ford was recovering well after breaking his leg on set in June.

"I was not on set. It was really terrible but I hear he's doing really well. It will take more than that to stop Harrison Ford," said Hamill, who was speaking on the red carpet of the UK premiere of Guardians of the Galaxy.