Dax Shepard, Kristen Bell Dax Shepard, Kristen Bell

Dax Shepard is officially outnumbered.

The Parenthood star and his wife Kristen Bell welcomed their second daughter on Friday, the two announced on Twitter. Delta Bell Shepard joins her older sister, 21-month-old Lincoln.

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Shepard, 39, and Bell, 34, married last year. In addition to showing off her growing belly in a series of adorable, hilarious Samsung ads, Bell's pregnancy will be written into the upcoming season of her Showtime comedy House of Lies.

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