Beyonce's dad says the singer has indeed welcomed twins with husband Jay Z.
"They're here! #beyonce #jayz #twins #birthday #happybirthday," he captioned an image on Twitter and Instagram reading, "Happy Birthday to the twins! Love, Granddad."
Social media users took issue with Knowles sharing the news before Beyonce. The star herself has yet to confirm she welcomed her second and third child.
"@MathewKnowles That was for Beyonce to tell not you," one person chided.
"@MathewKnowles they aren't here until Beyonce tells us they're here," another added.
Us Weekly reported Saturday that Beyonce gave birth to twins earlier in the week. The singer and Jay Z have slowly been spreading the news among family and friends, according to People.
"Bey and Jay are thrilled and have started sharing the news with the family and closest friends," a source told the magazine.
Beyonce and Jay Z are already parents to 5-year-old daughter Blue Ivy.