Chris Hemsworth's wife thinks he will be a "great dad".

The 'Thor' actor and spouse Elsa Pataky are expecting their first child together and the 35-year-old actress admits she was "mesmerised" when she first saw her spouse interact with kids.

She said: "He's the person I feel closest to and we understand each other very well. And then I see him as a great dad - it's important to know if the person you're with will be good at parenthood.

"Chris is very good with kids. His older brother has two little girls and a third on the way. We always spend our holidays together and it's lovely to watch him with his nieces. I was mesmerised by it. He's going to make a great dad. He's very excited."

Chris and Elsa got married in December 2010 after almost a year of dating but the 'Fast and Furious 5' star thinks starting a family is an even bigger commitment than tying the knot.

She told Britain's HELLO! magazine: "Starting a family is an even bigger commitment for me than getting married, because children involve you with the other person for the rest of your life so you have to be sure.

"Some people fall pregnant without giving it much thought but in our case, it's something we decided together.

"We both had [having children] in mind and I think it's one of the reasons you get married."