Beyonce has reportedly given birth to a baby girl named Ivy Blue Carter at a hospital in New York.

The R’n’B diva is believed to have give birth in a private wing of the Lenox Hill hospital - with E! online reporting that the happy delivery reported came by scheduled caesarean section.

The New York Daily News reports that the 30-year-old star checked into the upper East Side hospital on Friday night under the alias Ingrid Jackson.

The report goes on to claim that the entire fourth floor of the hospital was hired for $1.3million – and that bags of takeaway food and a dozen bottles of were taken into the heavily-guarded hospital wing on Saturday.

It is claimed that even doctors and nurses were prevented from entering the fourth floor, with one medic reportedly complaining that he had patients to see.

To prevent images from leaking to the public, hospital workers reportedly placed tape over security cameras and are forcing colleagues to hand over their mobile phones when they arrive for work, a source told the paper.

Jay-Z, is thought to have told friends they have named their baby Ivy Blue Carter. Carter is the new father's real surname.

'Congrats to Beyonce and Jay-Z' is, unsurprisingly for such a prominent celebrity birth, trending worldwide on Twitter.

The Bootylicious singer and husband Jay-Z have not yet made any official announcement. Speculation is rife that confirmation of the birth may form the basis of Beyonce's first tweet .

Family friend and music mogul Russell Simmons was among the first to tweet his congratulations about the arrival, saying: "congrats to my good friends Beyonce and Jay-Z".

Rihanna also sent her best wishes via Twitter, possibly putting herself forward for future baby-sitting shifts as an ‘aunty’.

"Welcome to the world princess Carter! Love Aunty Rih," she tweeted.

Similarly, Destiny's Child group mate Michelle Williams recently spoke of her willingness to help out with babysitting duties - although there's no chance of starting her own brood any time soon. Hear those comments by watching the video below.

The new mother was last seen late last week when she was photographed leaving a Manhattan apartment wearing skinny jeans, gold heels and a large scarf to cover up her bump, clutching her tummy as she got into an awaiting car.

Her pregnancy was announced back in August in true showbiz style as she stole the show at the 28th Annual MTV Video Music Awards before it even began, showing off her baby bump on the red carpet.

(Image: Reuters)

Her rendition of Love On Top that night drew a standing ovation from the audience, with the ecstatic crowd going even wilder when she pulled open the jacket, posed with her hands on her hips and rubbed her baby bump with an enormous grin.

Back in September, the superstar revealed that she was due before the end of the New Year, with sources in the States claiming that she was over nine months pregnant by the end of December.

During a clip from her Live at Roseland DVD, Beyonce told fans: “Hello! It's September 23rd. Right now I’m actually shooting the video for 'Countdown' and I’m six months pregnant, pretending that my stomach is flat in body suits.”

The pregnancy has been engulfed by bizarre rumours after an interview in Australia in October where Beyonce's mysteriously well-behaved baby bump led online conspiracy theorists to suggest she was actually wearing a prosthetic one.

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