Justin Timberlake and Jessica Biel are planning to have kids soon.

The 'Mirrors' hitmaker and his actress spouse - who tied the knot in October 2012 - are reportedly hoping to start a family this year, however, Jessica is said to be worried about the toll pregnancy will take on her sexy body.

A source told America's Star magazine: "Now that they're married and Justin has made it clear he is devoted to Jess, there is no reason not to start a family. However, she knows her body will take a hit. A lot of her roles are based on sex appeal so she is definitely nervous but she wants this. She's 100 per cent focused on making it happen."

Justin, 32, previously admitted he was in no rush to have children and would leave it up to "fate".

He said: "I'm not against the idea at all, but I think I still have some time ahead of me. Let's leave it to fate."

The devoted husband also credited his 31-year-old wife with giving him "stability" in his life.

He gushed: "She's brought me stability and an inner force. The most important thing for me is that we're able to communicate so well and talk about absolutely everything. It's beautiful to have that kind of closeness and understanding."