Entertainment power couple Beyonce Knowles and Jay-Z have welcomed a set of twins into their family, reports have claimed.

Multiple American media outlets confirmed the news. The actual date of birth, as well as the gender of the babies, is not yet known.

A source told People magazine: “Bey and Jay are thrilled and have started sharing the news with their family and closest friends.”

Beyonce announced her pregnancy in an Instagram photo in February – the most-liked post in history on the network.

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Announcing that she had twins on the way she said: “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.”

The new children join the couple’s first child, 5-year old Blue Ivy. 

There has been no official confirmation of the birth from Beyonce and Jay-Z themselves.

Beyonce is the most-nominated star in the history of the Grammy awards, and her album Lemonade was the world’s best-selling record of 2016.

Bey’s kids are the latest set of Hollywood twins, following the arrival of George & Amal Clooney’s twins – Ella and Alexander– just days ago.