Harrison Ford says the young actors in the new “Star Wars” movie need to prepare themselves for both the light and dark sides of fame. On Friday, the actor said, “It’s too late for them. I mean, it’s over. Life as they knew it is no longer possible. You’ve checked in for the biggest ride there ever was.” The 72-year-old actor appeared alongside fellow “Star Wars” veterans Mark Hamill and Carrie Fisher at Comic-Con Friday for a presentation on the anticipated seventh installment in the space saga, “Star Wars: The Force Awakens.” Director JJ Abrams and new members of the “Star Wars” family, including Adam Driver, Gwendoline Christie, Domhnall Gleeson and Daisy Ridley, were also on hand. “The Force Awakens” is set to hit theaters in December.