So why nearly a whole week for the blessed B-day news?
News that the singer had given birth, reported on Saturday by entertainment outlets including People magazine and US Weekly, ignited social media, with the so-called "Bey hive" fan group buzzing over the yet unrevealed sexes and names of the latest members of the Carter Clan.
The happy news was not only confirmed by several sources, but also by Beyonce's father, who took to Twitter to confirm the news. "We have been blessed two times over".
Beyonce's mother, Tina, gave her ex-husband's post a seal of approval by liking it, which suggests the family is fine with him sharing the news.
Jay Z recently sparked rumours Beyoncé had gone into labour when he skipped an appearance at the Songwriters Hall of Fame Awards, where he was due to be inducted by former U.S. president Barack Obama.More news: Time not right for interest rate rise, says Bank governor Mark Carney
More news: Punjab Govt. announces loan waiver for 'marginal' farmers
More news: London fire: Death toll climbs to 79
Later Obama sent Jay Z a video message - in which he appeared to have let slip the twins' genders.
Jay Z recently sparked rumours Beyoncé had gone into labour when he skipped an appearance at the Songwriters Hall of Fame Awards, where he was due to be inducted by former USA president Barack Obama.
Beyonce announced her pregnancy via Instagram on Feb 1. Earlier this year, Bey told Us, "Blue is so excited to be a big sister!"
The couple is already parents to five-year-old daughter Blue Ivy and it is claimed that just like Blue, the babies are a carbon copy of the 47-year-old Holy Grail singer. The family has yet to confirm or deny this news, but Jay was often spotted making trips to the LA hospital and spending most of his day there. The image showed Beyonce sitting, wearing a long transparent veil and lingerie while cradling her quite visible baby bump.