Dressed as a dog in a hot dog suit, Harrison Ford assured Jimmy Kimmel that "Star Wars: The Force Awakens" is "really, really good." However, he was unable -- and unwilling -- to reveal much more.

"What is there to say?" the franchise veteran asked Thursday on ABC's "Jimmy Kimmel Live!" "And why would you want to say anything? I want the audience to experience it. I don't want them to hear anything about it."

Kimmel, dressed as Princess Leia from the original "Star Wars," pressed on, asking why Mark Hamill doesn't appear as Luke Skywalker on the "Force Awakens" poster. "There wasn't room," Ford dead-panned. "No, there's a very good reason," he continued, before adding, "I can't tell you."

"I can tell you this: It's really, really good. Trust me," he chuckled, gesturing to his costume. "It's really good. The new cast -- Daisy Ridley, John Boyega, Adam Driver, Oscar Isaac -- are phenomenal. J.J. [Abrams] has made an incredible movie. You will not be disappointed, at all. I promise you."

They all discussed Ford's plane crash in March -- "I remember the engine stopping, I remember that part very well" -- his injury on the set of "The Force Awakens," his relationship with George Lucas, and his desire during the original trilogy to see Han Solo sacrifice himself "in some noble way."

Asked whether he was now glad the character wasn't killed off, Ford simply said, "Yes."

"Star Wars: The Force Awakens" opens Dec. 18.