Beyonce and JAY Z
Beyoncé and JAY-Z’s twins were born on June 13. Pictured: Couple attends the 66th NBA All-Star Game at Smoothie King Center on Feb. 19, 2017. Getty Images/Theo Wargo

Beyoncé and JAY-Z have been keeping mum about their twins since they welcomed them last month, but it looks like the music power couple could not keep their birthdate a secret any longer.

People has obtained a copy of Sir Carter and Rumi Carter’s birth certificate, which revealed that Beyoncé’s twins were born on June 13 and not June 12 as previously reported. The babies were delivered at 5:13 a.m. at Ronald Reagan UCLA Medical Center in Los Angeles. Rumi apparently arrived first, then her brother Sir followed. The attending ob/gyn who took charge of Beyoncé’s delivery was Dr. Paul Crane, the same doctor who helped Kim Kardashian and Kourtney Kardashian delivered their kids.

READ: Beyoncé flaunts a sexier frame just a month after giving birth to twins

In the same week Beyoncé gave birth to Rumi and Sir, multiple sources confirmed to Us Weekly that the songstress had already been admitted to the hospital. There was a noticeable increase in the security at the Los Angeles’ hospital, and Queen Bey’s staff were spotted carrying two baby seats into a medical facility.

Prior to the official announcement of their birth, Twitter spent days speculating when exactly Beyoncé went into labor. It took days before the family actually confirmed that the “Lemonade” singer had delivered her twins. In fact, if not for her dad Matthew Knowles’ post, fans would have kept wondering whether or not Beyoncé’s newborns had arrived.

On June 18, Knowles shared a sweet message on Twitter welcoming his youngest grandson and granddaughter. He shared a photo of a card with the message, “Happy Birthday to the twins! Love, Granddad,” which had colorful balloons in the background. “They’re here!#beyonce #twins #jayz #happybirthday,” Knowles wrote in the caption.

Then, after over a month of radio silence, Beyoncé later shared a picture of her twins last week on Instagram, much to the delight of her fans who were ecstatic to see Rumi and Sir. Her mom, Tina Knowles, then expressed her happiness over the new additions to their family. “So happy my baby shared a photo of her babies with the world. Proud grandma. Hello Sir Carter and Rumi Carter. Boy and girl what a blessing,” she wrote.

In other news, just a month after delivering her twins, Beyoncé is already back to her pre-pregnancy figure. The “Halo” singer shared multiple photos showing her sexier frame on Instagram, and many noticed that her stomach has already trimmed down. A source said that the singer has not hit the gym yet after delivering the twins, but she has already lost the extra pounds she gained during pregnancy.

What do you think of Beyoncé’s twins and her sexier figure after giving birth to Sir and Rumi? Share your thoughts below.