Kim Kardashian says her new nephew is the "perfect" Christmas present.

Kim's sister Kourtney's child, Mason Dash Disick, is the first grandchild in the Kardashian clan and Kim insists the whole family is overjoyed with the addition.

She said: "The whole family is so thrilled, excited and blessed to have Mason in our lives and we couldn't have asked for a more perfect gift this Christmas!

"My mom Kris is a grandma, and as much as she might say she doesn't like being called one, we know she secretly loves it."

Kourtney gave birth to Mason, whose father is Scott Disick, on December 14.

The 30-year-old star announced she was pregnant in August after discovering she was expecting after filming a new reality TV show with her other sister Khloe.

She said at the time: "We were in the Everglades and I kept feeling nauseous and sick and I just kept thinking, like, something wasn't feeling right. I've never missed a period in my life."