The ‘Just Give Me a Reason’ singer announced the news by sharing a photo of her cradling both her five-year-old daughter Willow and her baby bump, on Saturday 12 November.
She captioned the shot simply: “Surprise!”
After making the announcement Pink took to Twitter to thank Deborah Anderson, the photographer who captured the maternity shot.
Pink and Hart married in 2006 and their first child, Willow, was born in June 2011.