Rob Kardashian says his newborn baby is the "best thing" that has ever happened to him.

Dream Kardashian (c) Instagram/Rob Kardashian

Dream Kardashian (c) Instagram/Rob Kardashian

The 29-year-old star and fiancé Blac Chyna welcomed Dream Kardashian into the world three weeks ago and he has shared a new picture of the youngster, who already has a full head of hair, peacefully sleeping.

He added the caption on his Instagram account: "Sleep baby,,,, best thing that has ever happened to me in my life (sic)"

Rob took to the photo-sharing site shortly after Dream was born to share a snap of the little one and thank Chyna for being "strong" during her pregnancy.

He wrote: "Today was amazing :) I am so lucky!! Thank you @blacchyna for having our baby and being so strong ! I love you so much and can't wait to see her get older day by day with you Chy! I love you and Dream so much and Appreciate both of you (sic)"

In true Kardashian style, Rob has already set up an Instagram account for his daughter, who has amassed an incredible 754,000 followers in just three weeks but is only following two people, Rob and Chyna.

Rob's sister Khloe Kardashian recently revealed Dream doesn't cry "at all".

She said: "I go in to see Rob and Chyna. The baby was just born.

"She's super cute and calm and not crying at all!"

Rob and Chyna - who already has four-year-old son King Cairo with her former partner Tyga - are said to be planning to have their wedding filmed for a TV show for the right price.

The couple are thought to be on the lookout for venues which will be suitable for filming in the hope they will be able to strike a deal with a channel to air their big day.