A source confirmed the news to Us weekly.
The couple, who is already parents to 5-year-old Blue Ivy, welcomed their second daughter and first son on June 12.
The twins were born at LA's Ronald Reagan UCLA Medical Center, where Beyonce had an entire floor reserved to ensure privacy.
However, the pair is yet to publicly confirm or comment on the birth of their newborns.
Beyonce's father, Mathew Knowles, was first to announce the news on June 18, with a sweet Instagram post wishing the twins happy birthday.
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