May 17, 2010 03:40 PM

Brad Barket/Getty

The littlest Lachey has arrived!

Drew Lachey and wife Lea welcomed a son, Hudson Nicholas Lachey, on Saturday, May 15 in Cincinnati, Ohio, his rep tells PEOPLE.

Baby Hudson joins big sister Isabella Claire, 4.

The former Dancing With the Stars champ and 98 Degrees crooner, 33, announced the pregnancy in December.

— Sarah Michaud with reporting by Julie Jordan

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