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Selma Blair and Jason Bleick welcome a son

Selma Blair arrives at an Evening of Cocktails and Shopping to Benefit the Children's Defense Fund hosted by Coach on April 20, 2011, in Santa Monica, Calif. Getty

(CBS) It's a boy for Selma Blair and Jason Bleick.

The actress, 39, and her fashion designer boyfriend welcomed son Arthur Saint Bleick on Monday.

Pictures: Celebrity babies

Blair's rep confirmed the news of Arthur's arrival on Tuesday. Us magazine reports that the baby boy weighed in at 7 lbs., 12 oz.

It's the first child for the couple, who met while collaborating on Bleick's fashion line EVER, according to People magazine.

Blair announced the pregnancy in January.