"My favorite memory of 'Back to the Future' actually is seeing it! I was engaged to Dennis Quaid at the time and the movie had been out for like two months and we went to the Cinerama Dome," she said. "They gave me a free parking spot and it was completely full and we stood in the back and watched the whole movie. People were just ecstatic!"
Thompson said her favorite of all the "Back to the Future" movies -- where Marty McFly travels either back in time or into the future, usually to save his family or his close friend Doc Brown -- was the original.
She also kept the "pink dress" she wore in scenes with Fox from the first film almost three decades ago.
The actress, who was eliminated from "Dancing with the Stars" earlier in the month, said she doesn't keep in touch with the cast "too much," but "I love [the cast]. I do see Claudia [Wells, who played Jennifer Parker] a lot and Chris Lloyd [who played Doc Brown] here and there."