Nick and Vanessa Lachey post photo of their baby

Vanessa Lachey and her baby boy, Camden John Lachey.
Personal Photo/Twitter

Nick and Vanessa Lachey took to Twitter to introduce their baby boy, Camden John Lachey, to the world.

Vanessa tweeted, "@NickSLachey and I are honored and humbled to introduce you to the new Love of our lives, Cameden John Lachey," along with a picture of her holding the infant.

The couple first welcomed their baby boy on Sept. 12.

Last week, the new mom tweeted, "When I look over and see my husband and my son, my heart melts. I am so in LOVE with these two!#CountYourBlessings."

Nick, 38, and Vanessa, 31, tied the knot in July 2011. Nick was previously married to Jessica Simpson.