It's a girl for Beyonce and Jay-Z!
Press Association
Celebrity friends have taken to Twitter to congratulate Beyonce Knowles and Jay-Z on the birth of their daughter.
Gwyneth Paltrow and her husband, Coldplay frontman Chris Martin, are close friends with the new parents and Paltrow tweeted to say the baby would be called Blue Ivy Carter.
The subject was a trending topic on the social networking site on Sunday, but until Paltrow waded into the flurry of speculation it was thought the child was to be called Ivy Blue.
She tweeted: "Welcome to the world Blue! We love you already."
Rihanna also offered her congratulations to her friends, tweeting: "Welcome to the world princess Carter! Love Aunty Rih."
Cheryl Cole wrote: "Congratulations to Beyonce and Jay on the birth of their first child. Welcome to the world Blue Ivy!"
According to reports, Beyonce gave birth in a hospital in New York with her husband, whose real name is Shawn Carter, by her side.
The star's sister Solange Knowles also tweeted, saying simply: "The most beautiful girl in the world."
There has been no official confirmation from the couple, however.
Beyonce announced her pregnancy at the 2011 MTV Video Music Awards in August, cradling her bump on the red carpet before unveiling it on stage during her performance by opening her sparkly blazer.
After years of pregnancy rumors and months of due date whisperings, Beyonce has finally given birth to a baby girl. E! Online reports that multiple sources have confirmed that the couple welcomed their first child Saturday night.
As for the name? E! claims new daddy Jay is telling friends it's Blue Ivy Carter, but other outlets say it's Ivy Blue Carter. (Friend Gwyneth Paltrow tweeted Sunday morning that the baby is named Blue Ivy Carter.)
Reps for the couple haven't given the official word on their bundle of joy, but whatever her name, this little girl already has some famous friends sending their love to her.
According to New York Daily News, the superstar booked the fourth floor of the hospital for $1.3 million to make sure that her baby's entrance into the world was nothing short of fiercely glamorous.
Speculation that Queen B's due date was nearing was intensified right before New Year's Eve, as Beyonce's mother Tina, sister Solange and her family arrived in New York -- no doubt to welcome their newest family member.
It was even reported that Beyonce and Jay-Z welcomed a baby girl named Tiana-May Carter before the end of the year, but the rumors were put to rest after a still-pregnant Beyonce was spotted at dinner with Jay-Z on New Year's Eve in Brooklyn.
Those who were eagerly anticipating the birth of Beyonce's offspring pegged her due date to late December based on a DVD she released earlier this year, telling fans that she was six months pregnant. "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," she said in her "Live at Roseland" DVD, according to the UK's Daily Mail.
This is the first child for the couple who married in April 2008, uniting two of the biggest names in hip hop. Although B's baby will not be able to comprehend the magnitude of her parents' fame for some time, this sure is one lucky tot.
Edited By: GABRIELLA OSAMOR