After laying low for months, Beyoncé and Jay Z finally revealed a picture of their newborn twins Rumi and Sir Carter via Instagram on Thursday.

Captioning “Sir Carter and Rumi 1 month today,” the twins’ birthdate was revealed to be on June 13.

Reports say the 35-year-old singer had also filed trademark documents with the U.S. Patent and Trademark Office in late June.

Beyoncé and JAY-Z’s company filed papers to trademark the apparent monikers for everything from fragrances and cosmetics to baby gear, tote bags, and water bottles.

Sir and Rumi are the latest addition to the Carter family, joining five-year-old big sister Blue Ivy.