Chris Hemsworth and his wife, Elsa Pataky, have welcomed a pair of baby twins into the world... but what are their names? (No, their names are not Loki and Thor!) 

According to E! News, baby Tristan and Sasha were born last week, and Elsa posted a photo of the babies' feet on her Instagram, complete with a caption in her native Spanish. "They are already home. Tristan and Sasha arrived in this world 18 March just after the full moon. Complete happiness!!" she wrote.

Tristan and Sasha join elder sister India (born in May 2012).

While everyone knows Chris best for his role as Thor in the various Marvel comics series, including The Avengers, Elsa is not as well known on American shores, save for her supporting roles in The Fast and the Furious franchise.

On Tuesday, Elsa wrote a blog for Glamour en Espanol, where she talked about her impending motherhood, as well as provided advice for expectant and current mothers. She gave advice on fabrics to use (organic cottons, washed repeatedly), not to wash your baby with any harsh chemicals until they're over a year old (water is sufficient), and also gave advice to mothers about their upcoming little ones. "Cherish all the time you spend with them," she said, "because they grow up so quickly."

For his part, fatherhood is also suiting Hemsworth -- who played Captain George Kirk in the Star Trek reboot -- well. He told Us Weekly that being a father changed his life completely. "Just her being here," he said of his daughter, India. "It's certainly taken all my focus and attention away from work -- or what have you -- but that's the main thing on my brain right now. It's wonderful."

Elsa also agrees that Hemsworth is the best father her children could ask for. "My wife thinks I am. I love it. It's the greatest thing I've ever been a part of. When I am at work, she's what I'm thinking about, and when I'm not at work, she's who I'm hanging out with! I think [parenthood] brings out the child in all of us. That's what's so beautiful. It reminds you of the fascination you had with things, and how you can spend hours just being with someone. It's amazing," he told Australian Parade Magazine.