By Rita Kokshanian
Updated Jan 20, 2015 @ 7:53 am
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Ali Larter and Hayes MacArthur
Credit: Steve Granitz/WireImage

Ali Larter is officially a mother of two! Larter revealed on her website that she and husband Hayes MacArthur welcomed their second child, a girl named Vivienne Margaret MacArthur, on Jan. 15. The new baby joins older brother Theodore Hayes MacArthur, who is 4 years old.

The actress and foodie (her cookbook, Kitchen Revelry, came out in 2013), announced that she was expecting another baby in early August on The Tonight Show With Jimmy Fallon, and hasn't slowed down since. In addition to stepping out in an array of stylish ensembles (like the gorgeous colorblock Giulietta dress she wore soon after announcing the pregnancy), she's also showed off her toned physique in a bikini and even hosted a dinner party to benefit a good cause. Talk about giving working mama a whole new meaning! Cheers to the happy family.