Los Angeles: Reality TV star Kourtney Kardashian and partner Scott Disick have welcomed their third child.

The 35-year-old 'Keeping Up With the Kardashians' star gave birth to a baby boy yesterday, which was also the couple's elder son Mason's fifth birthday, reported a leading website.

"The family is freaking out with joy. What an amazing coincidence," said a source.

Disick, 31, and Kardashian have been together since 2006 and besides Mason, they have a two-year-old daughter Penelope Scotland Disick.