Her biggest masterpiece has arrived!

Life & Style can exclusively reveal that DC Cupcakes star Katherine Kallinis Berman and her hubby, Ben, welcomed a healthy baby girl on Feb. 19.

So what did they name her? Isis Sidney Berman.

"Ben and I are over the moon and so excited to welcome our little angel Isis into the world!" Katherine tells Life & Style exclusively.

The sweet little lady made her debut at Sibley Memorial Hospital in Washington, D.C., weighing in at 7 pounds, 2 ounces, measuring in at 19 inches long.

EXCLUSIVE: DC Cupcakes star Katherine Kallinis is having a baby girl!

This is the first child for Katherine and her lawyer husband.

As Life & Style previously reported, she couldn't wait to meet her little one.

"I am so excited to be having a girl!" she told Life & Style. "Now I can spoil her with all things pink and cupcake!"

The new mom found out about the gender when her sister (and co-founder of their bakery, Georgetown Cupcake) Sophie LaMontagne threw her a baby shower in November. Everyone at the event, including Katherine, learned she'd be having a girl at the same time when they bit into cupcakes stuffed with pink filling.

Congratulations Katherine and Ben!

Be sure to tune in and watch the DC Cupcakes special Baby Special, airing March 12 at 10 p.m. ET on TLC!