The Cabin in the Woods actor, who recently welcomed their first child, revealed that the couple would have named the baby Indiana if they had had a boy.
Hemsworth told E!: "It was just a name we liked, I always kind of liked Indie or Indiana for a boy and she liked India. We sorta went, 'Oh well, whether it's a boy or girl that will decide'. It just seemed to fit.
"I've wanted to have kids for a long time, and here it is, and I couldn't be happier."
Meanwhile, the 28-year-old Avengers star remained coy about the birth of the child, saying: "[It was] very recently - this is my politician['s answer], kind of, not giving too much away."
The couple, who started a relationship in 2010, announced the pregnancy back in January.
Watch Chris Hemsworth discuss Avengers below: