None. Celebrities cost ridiculous amounts of money that could be better spent increasing the size of the dialogue system as a whole (or ensuring that more than 10 voice actors do the voices for 10 races w/ male/female distinctions).
I'll try to say it as calm as possible:
Celebrity voices svck %&$[}!!!
Honestly i DON'T wanna hear celebrity voices, not in movies, not in games, I JUST DON'T because i want to imagine that character and not the ACTOR!
PLEASE stick to either TALANETED actors (Celebrities might be actors but that doesn't make the mcapable VOCIE actors, god i could have strangled Martin at every sentence) or no names that at least SOUND like the character they are playing.
This is a big mistake, thinking "Big name fits", NO it doesn't. I will say this and i know a lot will hate me for it but Patrick Steward svckED as the emperors voice actor.
PLEASE...NO CELEBRITIES! :nope:
If you're going to have spoken dialogue, then at least don't blow your budget on a celebrity for ten lines of dialogue.
What was that saying...oh yes...wise words from wiser men (women to any who i forgot)...need i say more...yes.
The absolute and maximum that is acceptable for me, is having a voice-actor do it for FREE or no more than 1 dollar, for their whole script, and i'm talking AT LEAST 100 different voices in total:
10 races
2 genders per race
10 times 2 equals 20
100 divided by 20 equals 5
so 5 per gender per race
I think it's safe to assume that there are 5 NPC's for each races gender, that dont sound the same, RPG's are about immersion, not which actor we can hear <_<