Actress Autumn Reeser has become a first-time mother after welcoming a son on Tuesday.

The O.C. star and her husband, writer/director Jesse Warren, welcomed a baby boy named Finn and the new dad announced the happy news in a post on his Twitter.com page, along with a picture of the couple with their new addition.

He writes, "The delivery of baby Warren was very successful. Autumn Reeser was amazing!... On May 10th, 2011 at 10:53 am... Little Finn was born into the world..."

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