Billy Dee wasn't in Ghostbusters, he was in Batman, Undercover Brother, and a few others.
Carrie Fisher was in "Austin Powers".
Warwick Davis was in "Willow", all the "Leprechauns", all the Harry Potters.
Jeremy Bulloch was in "Octopussy".
Both Peter Cushing and Christopher Lee were in "The Last Satanic Rites of Dracula".
Ewan McGregor was also in the "Velvet Goldmine", "Down With Love", "Black Hawk Down", "Rogue Trader"..
Hayden Christensen was in "Life as a House" (Excellent movie)
Heh, and heres me droppin' some cinematic history, all of which I know by heart:
Temuera Morrison/Jango Fett was in "Speed 2", "Once
Were Warriors", "The Island of Dr. Moreau", "Barb Wire", "Vertical Limit", "OWWW 2", "From Dusk Til Dawn 3",
"6 Days, 7 Nights", as well as some less notable New Zealand films and Television series'.