Kourtney Kardashian gave birth to her third child yesterday (Sun. Dec 14), which also just so happened to be Mason‘s fifth birthday.

Via People.com:

The Keeping Up with the Kardashians star and Scott Disick welcomed their third child, a boy, on Sunday, Dec. 14, PEOPLE confirms — the same day their son Mason Dash turned 5. The new baby also joins big sister Penelope Scotland, 2.

Kardashian, 35, revealed she was having a boy on last week’s episode of Kourtney and Khloé Take the Hamptons on E! “It’s going to be perfect for our family,” she said.

No other information about the boy, such as a name, is available at this time, but congrats to the fam on the new arrival!