United Kingdom, Sept. 17 -- Lady Gaga and her fiance Michael Polansky's baby is a girl.

On September 11, it was reported that the 40-year-old pop megastar and the 42-year-old entrepreneur have secretly welcomed their first child together.

And now a birth certificate obtained by TMZ reveals the newborn's name is Rose Bean Polansky, and she was delivered by Dr Robert Katz on June 9 at 11.19pm at Cedars-Sinai Medical Centre in Los Angeles.

An insider told People that Rose may have been inspired by Edith Piaf's song La Vie En Rose, which Gaga covered in the 2018 romantic musical film, A Star Is Born, while Bean could have been a nod to singer-and-activist Carl Bean, who inspired her 2011 smash-hit track Born This Way.

It comes days after ...