Kris Jenner might be celebrating her 60th birthday today, but her celebrations will no doubt be cut short by the news she's been slapped with a multi-million euro lawsuit.

A gaming company claim their designs and ideas for the Kim Kardashian gaming app were stolen and used without any credit.

Kung Fu Factory allege that Kris contacted them to put together a "very specific" proposal for a Kardashian-themed game, for which they included information on how the characters would appear and how the game would be played by users.

After months of radio silence, Kung Fu said they were told plans for the game were off and that the talks were "dead."

Yet in 2014, the Kim Kardashian: Hollywood gaming app was indeed launched with huge success. According to Forbes it has pulled in a record €185m in its first year alone.

Kung Fu want damages repaid and a chunk of the profits, in exchange for the ideas and research they shared with the famous family.

Speaking back in June, Kim said she was initially reluctant to launch a game, but that her husband Kanye West eventually convinced her.

"‘Kanye really talked me into doing this partnership… I thank him every day for making me do this deal," she told Mail Online.

Users of the app can create their own "aspiring celebrity" and help them rise through the ranks from Z-list to A-list by completing a series of tasks, like meeting managers, doing modelling gigs and attending parties – though there's no "make a sex tape" option…

Karl Lagarfeld recently became the newest celebrity to be added to the game, with users now able to buy Chanel-inspired clothes for their avatars.