Beyonce and JAY-Z's twins' birth certificates revealed – find out Rumi & Sir Carter's birthday!


The mystery behind Rumi and Sir Carter's actual birthday has finally been solved!

After weeks of speculation, ET has obtained the official birth certificates of Beyoncé and JAY-Z's newborn twins.

WATCH: Beyonce Shares First Photo of Twins Sir and Rumi Carter

According to the documents, the precious boy and girl were born on June 13 in Los Angeles, less than a minute apart. Dr. Paul Crane delivered the bey-bies, and if his name sounds familiar, you're not going crazy -- you may have heard about him on Keeping Up With the Kardashians, as he's the same doctor the famous family goes to!

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Beyonce's pregnancy Instagrams
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Beyonce's pregnancy Instagrams
😁🇺🇸
Flashback to an MJ+Prince party, crystals and ruffles, and a screw mix by Derek Dixie.
🤰🏽🏡 😂
💙Inaugural Wearable Art Gala in support of WACO Theater Center 💙
We would like to share our love and happiness. We have been blessed two times over. We are incredibly grateful that our family will be growing by two, and we thank you for your well wishes. - The Carters
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Beyoncé and JAY-Z's daughter, Rumi, was born at 5:13 a.m. PT, while son Sir arrived shortly after. Unlike the power couple's first child, 5-year-old Blue Ivy, the twins do not have middle names.

Sir Carter and Rumi 1 month today. 🙏🏽❤️👨🏽👩🏽👧🏽👶🏾👶🏾

A post shared by Beyoncé (@beyonce) on

ET caught up with Queen Bey's mother, Tina Knowles, at the 19th Annual DesignCare hosted by the Hollyrod Foundation in Los Angeles on Saturday, where she not only confirmed the name of her grandbabies, but gave us the scoop on how Blue Ivy is doing as a big sister.

WATCH: Tina Knowles Reveals How Beyonce Is Adjusting to Twins

"She's very proud and very excited," Knowles shared. "She's a good big sister, she really is."

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Beyonce, Blue Ivy and Jay Z sitting courtside
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Beyonce, Blue Ivy and Jay Z sitting courtside

NEW ORLEANS, LA - FEBRUARY 19: Jay Z, Blue Ivy Carter and Beyonce Knowles attend the 66th NBA All-Star Game at Smoothie King Center on February 19, 2017 in New Orleans, Louisiana.

(Photo by Kevin Mazur/Getty Images)

Beyoncé sits court side in the 2017 NBA All-Star Game at Smoothie King Center.

Derick E. Hingle-USA TODAY Sports

NEW ORLEANS, LA - FEBRUARY 19: Blue Ivy Carter and Beyonce Knowles attend the 66th NBA All-Star Game at Smoothie King Center on February 19, 2017 in New Orleans, Louisiana.

(Photo by Kevin Mazur/Getty Images)

NEW ORLEANS, LA - FEBRUARY 19: Beyonce Knowles attends the 66th NBA All-Star Game at Smoothie King Center on February 19, 2017 in New Orleans, Louisiana.

(Photo by Kevin Mazur/Getty Images)

NEW ORLEANS, LA - FEBRUARY 19: Jay Z, Blue Ivy Carter and Beyonce Knowles attend the 66th NBA All-Star Game at Smoothie King Center on February 19, 2017 in New Orleans, Louisiana.

(Photo by Theo Wargo/Getty Images)

NEW ORLEANS, LA - FEBRUARY 19: Jay Z, Blue Ivy Carter and Beyonce Knowles attend the 66th NBA All-Star Game at Smoothie King Center on February 19, 2017 in New Orleans, Louisiana.

(Photo by Theo Wargo/Getty Images)

NEW ORLEANS, LA - FEBRUARY 19: Blue Ivy Carter and Beyonce Knowles attend the 66th NBA All-Star Game at Smoothie King Center on February 19, 2017 in New Orleans, Louisiana.

(Photo by Kevin Mazur/Getty Images)

NEW ORLEANS, LA - FEBRUARY 19: Beyonce reacts after the 2017 NBA All-Star Game at Smoothie King Center on February 19, 2017 in New Orleans, Louisiana.

(Photo by Jonathan Bachman/Getty Images)

NEW ORLEANS, LA - FEBRUARY 19: Beyonce attends the 2017 NBA All-Star Game at Smoothie King Center on February 19, 2017 in New Orleans, Louisiana.

(Photo by Ronald Martinez/Getty Images)

NEW ORLEANS, LA - FEBRUARY 19: Beyonce and Jay-Z during the NBA All-Star Game as part of the 2017 NBA All Star Weekend on February 19, 2017 at the Smoothie King Center in New Orleans, Louisiana.

(Photo by Nathaniel S. Butler/NBAE via Getty Images)

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