Justin Bartha & Lia Smith Welcome Baby

Lia Smith and Justin Bartha attend The Art of Elysium's 7th Annual HEAVEN Gala presented by Mercedes-Benz at Skirball Cultural Center on January 11, 2014 in Los Angeles -- Getty Images

Justin Bartha is a dad!

The "Hangover" actor and his wife, Lia Smith, welcomed a baby girl on Sunday, April 13, Us Weekly reported.

This is the first child for the couple, who got engaged in May 2013 and tied the knot in January in Hawaii.

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Justin and Lia, a personal trainer, said their vows just a few months ago as a handful of family and close friends - including Reese Witherspoon and her husband, Jim Toth (Justin's agent) - looked on.

Jesse Eisenberg and Justin's "Hangover" co-star Ken Jeong were also in attendance.

-- Erin O'Sullivan

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