MSNBC's chief Washington correspondent Norah O'Donnell gave birth Saturday to a baby girl. Riley Norah Tracy comes in at eight pounds and 21 inches. Riley joins her older brother and sister, Henry and Grace (pictured with husband Geoff Tracy) who were born just 14 months ago. O'Donnell told TVNewser before she went on family leave that she'd be back on the air in time for the political conventions late next month.

It was the late Tim Russert who announced O'Donnell's pregnancy on his MSNBC show back in February.