Chris Hemsworth and Elsa Pataky Release Twins' Names

The 'Thor' star and his actress wife welcomed twin boys on March 21.

March 21, 2014 -- Elsa Pataky and Chris Hemsworth have announced their newborn sons' names.

"You are home! Tristan and Sasha came to this world on March 18 just after full moon," Pataky, 37, wrote on Instagram, along with the photo below. "Complete happiness!"

The "Thor" star, 30, and his actress wife welcomed their twin boys on this past Friday. They're also parents to a daughter, India, who will turn 2 in May.

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In November, a rep for the Hemsworth confirmed that the couple was expecting, and a few months later, it was revealed that they were having twins.

For Hemsworth, fatherhood has been a treat.

"It makes it harder and harder to leave and go to work," he told People magazine of his daughter. "I enjoy being at home a lot more than I ever have. ... She's the best."