Kourtney Kardashian has given birth to her third child, a little boy. The star revealed in an episode of her hit family show Keeping Up With The Kardashians, that she was expecting a boy earlier this month. The reality TV star's latest addition to the family arrived earlier today, which is also her son Mason’s fifth birthday. The newborn will join his brother and two-year old sister Penelope. Kourtney with the couple's eldest son Mason and daughter Penelope. The 35-year old, who did a nude photoshoot to celebrate her third pregnancy with DuJour magazine said: "I had done a nude shoot when I was pregnant with Mason, really last minute just for myself, and I love it. This time, we were shooting for our show, and everyone on our camera crew was like, 'You are so comfortable just walking around naked and pregnant!' [But] what appeals to me is celebrating the shape of my body being pregnant and capturing that time in my life...It's a wonderful thing to be able to show my children these photographs one day and say, 'This was you inside'…I'm at my best when I'm pregnant. "It's such an amazing feeling, the transformation that your body goes through. There's something about that that's so empowering and beautiful." Kourtney and partner Scott have yet to reveal the name of their new baby boy.