Kourtney Kardashian and her partner Scott Disick have named their new baby boy Reign Aston Disick.

Kourtney, who now has three children with Disick, shared the news on Instagram by posting a picture of her holding hands with Reign. The image was captioned, "Madly in love with my little Reign Aston Disick."

Reign was born on December 14 and will share his birthday with his five-year-old brother Mason.