The stars joined other actors from the 1983 blockbuster, including Peter Mayhew, Anthony Daniels, Warwick Davis, Jeremy Bulloch and Ian MCDiarmid, to launch the Star Wars Celebration Europe convention in Essen, Germany.
The cast thrilled fans by reuniting on the first day of the event, but Harrison Ford was notably absent from the line-up.
Davies said of the movie, "For me, it was the beginning (of my career). It was the most amazing experience. I never thought we'd be celebrating that film 30 years on."
The reunion was dominated by talk of the new Star Wars movie, which J.J. Abrams will begin filming in the U.K. next year (14). Daniels, who played android C-3Po, hinted he may be reprising his role in the upcoming blockbuster after recently meeting with creator George Lucas.