The baby makes three. Last night, Vanessa and Nick Lachey announced the arrival of their son, Camden John.

“We are incredibly proud to announce the birth of our beautiful baby boy, Camden John Lachey,” the couple said in a statement to E! News. ”Born today at 6:54 p.m., he came into this world at 8 pounds, 9 ounces and 21 inches. Love has truly been redefined for both of us.”

This is the first child for the couple, who wed in July 2011. They announced in March that they were expecting a baby.

The couple has been documenting their birth via Twitter, keeping fans informed throughout their trimesters. Vanessa has been especially active, constantly tweeting pics of her ever growing baby bump.

Congrats to the happy couple and their new addition.

What do you think of the baby’s name? Will he and Maxwell Drew Simpson be best buds?

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Expectant mom Vanessa Lachey followed through on a promise to her Twitter followers after pledging to share a photo of her growing baby bump. In celebration of what she termed ‘Maternity Monday’, the television host tweeted this message to fans:

“#Maternity Monday: Let’s embrace our changing bodies! Show me [sic] ur bump & I’ll show [sic] u mine! Let’s get creative!”

After receiving dozens of responses, Lachey tweeted a photo of her own, taken poolside by husband Nick. Positive feedback from the image was barely able to subside before Vanessa made yet another baby announcement yesterday afternoon on her website.

“It’s a BOY. Nick and I are incredibly excited to share the news that we are expecting a baby boy. We can’t wait to meet him soon!!!” she wrote.

The couple wed last July in the British Virgin Islands after nearly six years together. This past March, Nick announced on Live! with Kelly that his wife was pregnant with their first child. Due in September, Vanessa has previously vocalized her family preference, stating that she would want “three boys and a girl”. Immediately after the announcement of her pregnancy, Vanessa replied to a fan via Twitter when asked if she wanted a boy or a girl:

“I’m excited either way! But I always wanted a boy 1st. Just a healthy baby,” she wrote.

We wish the couple health and happiness as they enter into their third trimester! What do you think of Vanessa’s belly pic?