Beyonce's Dad Mathew Knowles Celebrates Arrival of Twins

Beyonce Knowles & Matthew Knowles
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Beyonce Knowles poses with her father and manager Matthew Knowles at the 'Beyonce: Beyond the Red Carpet auction presented by Beyonce and her mother Tina Knowles along with the House of Dereon to benefit the VH1 Save The Music Foundation June 23, 2005 in New York City

Beyonce’s dad, Mathew Knowles, celebrated part of his Father’s Day congratulating his daughter and son-in-law on the arrival of their new twins.

“They're here! #beyonce #twins #jayz #happybirthday,” Knowles posted on Twitter and Instagram Sunday (June 18), along with a photo of balloons and a card that reads, “Happy Birthday to the twins! Love, Granddad.”


They're here! .? .? .? #beyonce #jayz #twins #birthday #happybirthday

A post shared by Mathew Knowles (@mrmathewknowles) on

Beyonce and Jay Z welcomed twins earlier this week, according to multiple published reports. TMZ says that the twins -- reportedly a boy and a girl -- were born Monday in a Los Angeles hospital. Billboard has reached out to Beyonce’s rep for comment.

Rumors that the 35-year-old Lemonade singer was in labor began to captivate the Twittersphere after a "significant amount" of security was spotted at a hospital in L.A. Coupled with earlier reports that the couple spent $1 million to build a maternity ward in their Hollywood mansion, the news rapidly overtook the Internet.

The Carters first announced that they were expecting twins in February through a now-viral Instagram post, which pictured Bey flaunting her bare belly before a flower display.