O'Donnell and wife Michelle Rounds' daughter, who is O'Donnell's fifth child, was born on January 5 and weighed 5 pounds and 5 ounces, O'Donnell's spokesperson told OTRC.com. The couple adopted Dakota about seven months after they wed in June 2012.
"Dakota has a photo shoot," O'Donnell wrote in one caption.
Rounds is a corporate head hunter in New York and previously had no children of her own. O'Donnell was previously married to long-time partner Kelli Carpenter from 2004 to 2007. The couple share three adopted children -- sons Parker and Blake and daughter Chelsea -- and Carpenter gave birth to their daughter Vivienne Rose, in 2002.