When They Were in Trek.

1. Kirsten Dunst as Hedril.

Was a child of the Cairn In TNG episode Dark Page when she was 11. She part of a telepathic species who had no concept of communication through speaking. If only eh.

2. Ashley Judd as Ensign Robin Lefler.

In TNG episodes The Game and Darmok. Wesley's love interest. Shut up Wesley.

3. Seth Macfarlane as Engineer/Ensign Rivers

Starred in Enterprise episodes The Forgotten and Affliction. Should've got him to write the script too, might not of been cancelled.

4. Mick Fleetwood as Antedian Dignitary.

The drummer from Fleetwood Mac starred as an Antedian Dignitary in TNG episode Manhunt. Although should probably have been in the band in Star Wars, miscasting obviously.

5. Iggy Pop as Yelgrun.

Iggy played a Vorta in DS9 episode The Magnificent Ferengi. Iggy. Fucking. Pop.

6. Sarah Silverman as Rain Robinson.

Appeared in a Voyager two parter, Future's End as a 20th century scientist. Nothing funny here, move along.

7. Dwayne Johnson as The Champion.

The Rock played The Champion (original huh?) in Voyager episode Tsunkatse. Gets into a fight with Seven. Mmmm. Bewbs.

8. Bryan Singer as Kelly the Tactical Officer.

The X-Men: Days of Future Past director nabbed a bit part in Nemesis. Apparently.

9. Famke Janssen as Kamala.

Played herself in TNG episode The Perfect Mate. No wait, she was an empathic metamorph with the ability to give any man what he desires in a woman. So she barely had to act at all.

10. Teri Hatcher as Chief B. G. Robinson.

Played transporter Chief in TNG episode The Outrageous Okona. Got banged by Okona. What more to say.

11. Ken Jenkins as Dr. Paul Stubbs.

Dr Kelso played another doctor in TNG episode Evolution. Funnily enough this doctor was also so far up his own arse he couldn't see the sun rise.

12. Jason Alexander as Kurros.

George from Seinfeld appeared in Voyager episode Think Tank. He played an intelligent, but greedy, problem solver. After Janeway refused to make a deal to secure Kurros and his crews help, (he wanted 7of9 among other things,) she left them getting their collective asses kicked by the Hazari.

13. Tom Morello as Son'a Officer / Crewman Mitchell

The guitarist from Rage Against The Machine was first in the movie Insurrection as an uncredited stretchy faced Son'a and then in Voyager episode Good Shepherd were he had the crucial role of "Crewman Mitchell" and the important lines of "To the left, ma'am"

14. Christian Slater as Communications Officer.

Slater nabbed a little cameo in Star Trek VI: The Undiscovered Country as a night duty officer on the Excelsior. The director apparently made the scene in such a way as to make the audience go, "wait..was that?...you know, what's his face?"

15. Kelsey Grammer as Captain Morgan Bateson

Frasier appeared in TNG episode Cause and Effect as captain of the USS Bozeman which was transported forward in time, collided with and destroyed the Enterprise-D! Oh noes! It was ok in the end though, eventually.

16. Kirstie Alley as Saavik

Kirstie Alley appeared as a Vulcan in Star Trek II: The Wrath of Khan. When she was still hot.

17. Abdullah II King of Jordan as Science Division Officer.

King Abdullah II of Jordan appeared in Voyager episode Investigations when he was just a lowly Prince. Didn't say a word. Just stood there smirking, so would I if i was a rich prince who just nabbed a bit part in Star Trek.

18. Mark Sheppard as Leucon.

Crowley. When he was slimmer and less demonic played a Brunali in a Voyager episode named Child's Play. He had his son, Icheb, genetically altered and sent to the Borg in the hope he would infect them and stem their expansion. Twice. So not a demon, but still no less of a twat.

19. Kevin Peter Hall as Leyor.

The dude who played The Predator in the original film. This big mofo played a Caldonian diplomat who hunted others species as a rite of passage and...no wait, wrong alien.

Well, that's it. I hope you didn't know at least some of these.