Justin Timberlake, Jessica Biel want to start a family soon, report says

Justin Timberlake and Jessica Biel are planning a baby, a Star magazine report said this week. But the 31-year-old "Total Recall" actress is worried about the impact that a baby will have on her career.

''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," a source told the magazine. "

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 percent focused on making it happen.," the source added.

The celebrity power couple cemented their five-year courtship in October 2012, with an Italian wedding attended by 100 guests. Jimmy Fallon and Timbaland were among the wedding's high-profile attendees.

Speaking to Ellen DeGeneres in April, Timberlake gushed about his marriage to his "best friend."

Every once in a while I can catch a glimpse of her when she doesn't see me looking and I have this moment when I'm like, 'If you never make a good decision, if you only make bad decisions for the rest of your life, you made one really good decision. It's nice to marry your friend, it's nice to marry your best friend. It suits me.