Beatrice Jean Howard-Gabel was born Thursday. She weighed in at 8 pounds, 6 ounces, TVGuide.com reported.
The actress married "Fringe" actor Seth Gabel in 2006. They are also the parents of a 4-year-old son named Theo.
"Bryce and baby B are spectacular," Ron Howard posted on Twitter late Saturday. "daddy Seth & brother Theo are beaming ear to ear."
Bryce Dallas Howard's film credits include "The Village," "Lady in the Water," "50/50" and "The Help."
Texas principal bans speaking Spanish, stirs controversy
Martin Bashir resigns from MSNBC over Sarah Palin comments