Khloe and Rob Kardashian

Khloe and Rob Kardashian

Rob Kardashian is reportedly moving in with his sister Khloe.

The 27-year-old star has been in a "dark place" since learning that he is at risk of developing diabetes and eventual organ failure due to his recent weight gain.

However, he's planning on living with Khloe, 29, who has just bought Justin Bieber's former house in Calabasas, California, because he wants her to help him shift the extra pounds and make sure he keeps it off.

A source told Us Magazine: "Living alone isolated him. Rob needs to be around people who love him."

Rob will also have his sister Kourtney close by as well as she has just bought a property in the same gated community, The Oaks.

The sock designer previously lived with Khloe and her ex-husband Lamar Odom at their former marital home in Tarzana, California, but he moved out last year after he failed to stick to his weight loss plan.

Meanwhile, Rob - whose father Robert Kardashian died aged just 59 from oesophageal cancer in 2003 - is reportedly refusing to attend his sister Kim and her fiancé Kanye West's wedding next month in Paris, France, because he's embarrassed of his weight gain.

A source said previously: "Rob is upset about his changing shape and truly feels like the black sheep of the family."