Superstar couple Beyonc � Knowles and Jay-Z have welcomed their first child -- a baby girl named Blue Ivy Carter.
The 30-year-old singer's daughter arrived via scheduled caesarean section at Lenox Hill Hospital in New York City last night.
No baby blues: Jay-Z and wife Beyonce reportedly booked the entire
fourth floor of the Lenox Hill Hospital for her delivery. File pic/afp
The couple's close friend Gwyneth Paltrow confirmed the baby's arrival on Twitter, writing, "Welcome to the world Blue! We love you already."
Beyonce's 42-year-old rapper husband Jay-Z, real name Shawn Carter, was by her side during the birth.
Despite initial confusion the baby was named Ivy Blue, it was later clarified that the newborn was actually called Blue Ivy.
Paltrow also clarified the name to a confused Twitter follower, "It's Blue Ivy Carter."
Celebrities have already started tweeting their congratulations to the couple, including hip-hop mogul Russell Simmons and Rihanna.
Beyonc � checked into the Upper East Side hospital under the name Ingrid Jackson. She is said to have booked out the entire fourth floor spending $1.3 million (Rs 68 crore) it has been claimed.
While a spokesperson for the power couple was not available for comment, security is said to have been tightened at the hospital.
Hospital workers are being asked to turn in their mobile phones and security cameras have been covered with packing tape, according to a news site.
At one point, a doctor was heard complaining the heavy security meant he couldn't check up on his patients properly.
Beyonc � first announced her pregnancy at the 2011 MTV Video Music Awards back in August, when she arrived on the red carpet cradling her tiny bump.
The singer also showed off her growing tummy after her onstage performance at the same ceremony -- unbuttoning her sequinned jacket and rubbing her tummy.
It was originally thought she was due in February, but Beyonce revealed that she was six months pregnant at the time.