Shon T'Hara wrote:
There aren't a lot of starring roles for Indian actors in Hollywood. This was one of them.
The part's never been played by an Indian actor or by an actor who resembled an Indian.
For that matter Uhura's never been played by an actor who really looks African*, but white Americans tend to have rather generalized and inattentive notions about race and ethnicity to the extent they exist.
*I can't recall whether Uhura is canonically - that is, onscreen - African or whether that's just what's been said in supporting biographical material for the character. Sulu was eventually established to have been born in the United States (ST 4)