Credit: Chris McKay/Getty

Rachael Leigh Cook is now a two-under-two mom! The Perception actress and her husband Daniel Gillies just welcomed their second child, Theodore Vigo Sullivan Gillies, on Saturday, April 4, People confirmed. Theodore joins his older sister Charlotte Easton, 18 months, in the growing family.

“Welcome to the party, Little Buddy. We love you so much,” Cook tweeted about the arrival of the baby boy, who weighed in at 8 lbs., 14 oz., and was 20.5 inches long.

The couple's children are close in age, but it seems that Cook and Gillies are prepared. “We’re as happy as we were surprised by this wonderful news! We haven’t slept since 2013 and welcome advice from all parents who survived Two Under Two,” the pair said in a statement when they announced the pregnancy.

Cook and Gillies, who stars in The Vampire Diaries spinoff The Originals, have been married since 2004—congrats to the parents!