Beyonce‘s dad weighed in on the birth of his twin grandkids six days after the infants weighed in.

Mathew Knowles took to social media Sunday with a digital birthday card to Beyonce’s new baby boy and girl with a tag that said … “They’re here!” The card read …”Happy Birthday to the twins! Love, Granddad.” He also threw in hashtags like #beyonce #jayz #twins #birthday and #happybirthday.

TMZ broke the story … the twins were born Monday but have remained in the hospital because of a “minor issue.” Beyonce has also remained in the hospital with her newborns.

Mathew is the first family member to publicly shout out the birth.