I got a question for you: Yvonne Joyce Craig (May 16, 1937 -- August 17, 2015) was an American ballet dancer and actress best known for her role as Batgirl in the 1960s television series Batman and as the green-skinned Orion slave girl Marta in the Star Trek episode "Whom Gods Destroy" (1969). The Huffington Post called her "a pioneer of female superheroes" for television.

Answer this question: who played the green girl in star trek?
Let's think first:
To answer the above question, the relevant sentence is: Yvonne Joyce Craig (May 16, 1937 -- August 17, 2015) was an American ballet dancer and actress best known for her role as Batgirl in the 1960s television series Batman and as the green-skinned Orion slave girl Marta in the Star Trek episode "Whom Gods Destroy" (1969).
Therefore, the answer is Yvonne Joyce Craig.