Beyoncé and Jay-Z have welcomed a baby girl – their first child, it has been reported.

Beyoncé and Jay-Z’s daughter has been named Blue Ivy Carter, according to eonline.com.

It was reported that Beyoncé, 30, gave birth to her daughter by caesarean section at Lenox Hill hospital in New York last night and the website said “multiple sources” have confirmed the news.

Meanwhile, celebrities have already started tweeting their congratulations to the couple with Russell Simmons and Rihanna were among the first.

Russell wrote: “Congrats to my good friends Beyonce and Jay-Z.”

Rihanna posted: “Welcome to the world princess Carter! Love Aunty Rih.”

Beyoncé gave birth to her daughter Blue Ivy Carter by caesarean section at Lenox Hill hospital in New York last night

The New York Daily News reported that Beyoncé checked into the Upper East Side hospital under the name Ingrid Jackson.

Beyoncé, who was spotted out with her mother on Thursday night, is said to have booked out the entire fourth floor spending $1.3million.

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, according to the news site.

Baby rumors reached fever pitch on December 30 with reports that Beyoncé had given welcomed a daughter called Tiana May Carter.

It came after reports suggested that staff at St Luke’s Roosevelt Hospital – a private facility in New York – had been told to prepare for a VIP arrival.

However, Beyoncé’s sister Solange rebutted the rumors by telling fans that the singer had spent New Year’s Eve at her house party in Brooklyn.

The baby girl is the first child for Beyoncé and her husband Jay-Z and the second grandchild for her parents Tina and Mathew Knowles.

Beyonce’s younger sister Solange, 25, has a 7-year-old son Daniel Smith JR.

The addition to the Knowles clan will be some welcome good news just weeks after her parents’ divorce became final.

Tina and Mathew had been married for 31 years.