Bell's fiancé, Dax Shepard, whom you may recall from Season 1, Episode 1 of Punk'd, in which he pretended to steal Frankie Muniz's car (PUNK'D), announced his daughter's birth via Twitter this afternoon.
Her name is Lincoln, like the president, luxury car company, and Logs®:
Lincoln Bell Shepard is here. She has mom's beauty and dad's obsession with breasts. Hooray!!!— dax shepard (@daxshepard1) March 28, 2013
Later, Kristen Bell posted a tweet about the poops that emerge from Lincoln:
My new roomate poops her pants and doesn't pay rent...basically @daxshepard1 pre-sobriety :) welcome baby Lincoln xo— Kristen Bell(@IMKristenBell) March 28, 2013