By Jake Perlman
Updated February 20, 2014 at 10:45 PM EST

That ’70s Show star Danny Masterson and his wife Bijou Phillips welcomed their first child together on Valentine’s Day, according to People.

Baby girl Fianna Francis Masterson weighed in at 8 lbs., 5 oz. and measured 21 inches long.

“Hello friends. Beyond thrilled to announce the birth of our daughter Fianna Francis Masterson! Mom and baby are doing amazing. You can all refer to me as dj dadpants from now on,” Masterson, 37, wrote on his Instagram account along with a picture of the newborn.

Masterson and Phillips were married at a private castle in Ireland in October 2011.