Former 98 Degrees singer Nick Lachey, 38, and television personality Vanessa Minnillo, 31, welcomed their first child together on Wednesday.
Their son Camden John was born at 6:54 p.m. and weighed 8 lbs., 9oz.
The new parents, who married in July of 2011, said in a statement:
"We are incredibly proud to announce the birth of our beautiful baby boy, Camden John Lachey."
They added: "Love has truly been redefined for both of us."
Lachey told Us Weekly earlier this year that he and Minnillo were prepping for the new baby.
He explained: "The nursery's ready, we got the stroller, we got the car seat.
"Now it's just emotionally figuring out what we do, and I don't think that ever ends."
Lachey's ex-wife Jessica Simpson, 32, gave birth to her first child, daughter Maxwell, in May.
The new mom recently showed off her post-baby body on television earlier this week, revealing she lost over 40 lbs.