Nick and Vanessa Lachey welcome baby girl

Nick Lachey & Vanessa Minnillo Lachey of VH1 Big Morning Buzz arrive at Sprint Sound Sessions at Webster Hall on April 29, 2014, in New York.

Ilya S. Savenok/Getty Images

There's another Lachey baby in Hollywood.

Nick Lachey and his wife, Vanessa, welcomed their second child on Monday.

They named their newborn baby girl, Brooklyn Elisabeth Lachey. She weighs in 7 lbs., 15 oz. and measures 21 inches long. Brooklyn joins 2-year-old brother Camden John.

The couple announced the news on Vanessa's website, noting that Brooklyn has already "won over all of our hearts."

"I have been dreaming of this moment for as long as I can remember, the day I was going to meet my little girl. A friend recently told me how magical today was going to be because it's the day I would meet my best friend," Vanessa writes. "I can't even begin to tell you how it felt to hold her in my arms for the very first time. Mommy, Daddy and big brother Cam love you so much already, Brooklyn!"

Shortly after Camden was born, Nick told CBS News that fatherhood is "an amazing journey and it truly is a journey. Every day there's something new and different that he's doing or that's happening. I've just learned to enjoy every moment for what it is and take it all in. It's been an amazing ride so far truly, and it's only just started."