Timberlake, 32, and Biel, 31, tied the knot on October 19 in a romantic Italian wedding, reported Hollywood Life.
"They want to start trying for a baby as soon as his tour wraps in August. It's in their plans. That's why they kept breaking up - I don't think he was sure he wanted children. He's changed his mind, and he definitely wants kids with Jessica!," a source said.
Timberlake had previously said that marrying Biel was the best decision he has ever made.
"Every once in a while I can catch a glimpse of her when she doesn't see me looking and I have this moment where 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," he had said.