Beyonce's one month old twins were named Sir Carter and Rumi.

The wait is over. In a gorgeous Instagram photo shared on the night of July 13, Beyoncé not only revealed our first look at her twin babies with JAY-Z, but divulged their names and their birthday!

Pop diva Beyonce unveiled her newborn twins to the world on Friday, posting a glamorous photo on Instagram and announcing their names.

"Sir Carter and Rumi 1 month today," reads the caption on the photo, which focuses much more on the 35 year old yummy mummy than the little ones.

That wording puzzled many people on social media is the first child named Sir Carter or simply Sir, Carter being the last name of their rapper father Jay-Z ? Others wondered about the gender of the babies.

Beyonce's mother Tina Knowles cleared it all up later in her own Instagram post: one twin is a boy named Sir, period, and Rumi is a girl.

"So Happy my baby shared a photo of her babies with the world," Tina Knowles wrote. "Proud grandma hello Sir Carter and Rumi Carter... boy and girl what a blessing."

In the photo, Queen Bee is shown barefoot, standing on a lawn with the ocean in the background. Towering over her is a large display of colourful flowers.

She is wearing turquoise bikini bottoms and a dramatic ruffled lilac print robe, open at the front and cascading to the ground, twinned with a floor-length pale turquoise veil.

In her arms are the twins, each with a full head of hair and their eyes closed.

The set-up is similar to the one she used to announce her pregnancy back in February, in which she was pictured kneeling in front of a similar floral display while wearing a flowing veil.

"We would like to share our love and happiness," she wrote at the time. "We are incredibly grateful that our family will be growing by two, and we thank you for your well wishes."

The twins' first photo attracted plenty of love from Beyonce's passionate fans, with the post garnering 2.5 million "likes" within an hour.

Beyonce and Jay-Z are music's royal family she and the 47 yearold Jay-Z, whose real name is Shawn Carter; already have a five-year-old daughter, Blue Ivy.

Until Friday, the power couple had not even confirmed the twins' birth, though Beyonce's father acknowledged the delivery on social media.

It has been an extremely busy time in the celebrity household.

On June 30, Jay-Z released his first album in four years. The rapper bared himself as he rarely had before in "4:44," apologizing to Beyonce for his infidelity and pouring out love for his mother, whom he reveals to be a lesbian.

He has also announced a North America tour, with 31 dates across the United States and Canada from October to December.

As an expectant mother, Beyonce made a New Age celebration of women at the Grammy Awards earlier this year putting on an extravagant, abstract performance while proudly displaying her baby bump cloaked in a flowing gold gown.

Rumi is the name of the 13th-century Persian poet who endures as one of the best-loved writers of the Sufi spiritual tradition, with verses that celebrate love, joy and tolerance.

On "4:44," Jay-Z alludes to Persian poetry on the song "Marcy Me," which describes his upbringing in a public housing project.

Appearing to liken his rhyming skills to the literary tradition, Jay-Z raps, "Sufi to the goofies / I could probably speak Farsi."