many of those are after their first little known roles such as Jennifer Assinine being on the Ferris Bueller tv series, Jack Nicholson in a couple other Corman films (The Wild Ride) or if your up for a day of wasted laughs, watch Chips and Miami Vice and see all sorts of people before they were famous.
Goes to show that back in the 80s and 90s instant fame didn't exist and you had to work your way up. Too bad it really doesn't seem to work that way anymore, it makes for a better actor. I loved the Sean Connery one. I'd only ever heard him sing that tiny bit in Dr. No before.