Grey's Anatomy star Jessica Capshaw has given birth to a baby girl.

Josephine Kate Gavigan was born on Monday, May 2, according to an Instagram post from Capshaw. "I am endlessly grateful for her safe arrival and my heart is so full of love that it threatens to burst...," the actress wrote alongside a picture of the newborn.

Josephine is the fourth child for Capshaw and her husband, Christopher Gavigan, a co-founder of the Honest Company. They are already parents to son Luke Hudson, 8, and daughters Eve Augusta, 5, and Poppy James, 3. Capshaw announced her pregnancy in December.

Congratulations to the growing family!