Original Star Wars actor Mark Hamill called his return to the movie after more than 30 years an "unexpected gift."
Speaking at the UK premiere for Guardians of the Galaxy, he said shooting for the franchise had him reminiscing about filming on set the first time round.
"It's certainly unexpected, we had a beginning middle and end, I never thought we'd come back. I still can't believe it's happening and to go onto those sets that evoke so many memories is just astonishing, I have real ties to this country, my son was born when we were making Empire Strikes Back. It just seems like an unexpected gift."
The 62-year-old starred in the three original Star Wars films, the first of which was filmed in 1977.
The new film, which only has the working title Episode VII so far, is due to be released in 2015.
