"Meet the newest love of our life, Wilder Frances Faison," Cobb, 37, captioned, introducing her daughter for the first time. "#babygirl." Still at the hospital, the newborn slept while bundled up in a white blanket.
Cobb announced in October that she and the Scrubs alum, 40, were expanding their family. The couple, who wed in December 2012, are already parents to 20-month-old son Rocco. (Aka, the best friend of Jessica Simpson's son Ace!)
While awaiting Wilder's arrival, Cobb was the guest of honor at a baby shower last month. "Words can't even describe the amount of love that went into this day," she captioned a photo of the Pinterest-worthy table setting via Instagram. "Thank you @jessicaSimpson – my heart is full. #babylove."