Socialite-turned-reality TV star KIM KARDASHIAN has split from her sports star boyfriend, amid reports the couple was about to announce plans to wed.

The Keeping Up With The Kardashians star and New Orleans Saints hero Reggie Bush have parted amicably, according to the brunette's publicist, who has denied rumours of infidelity.

Meanwhile, a source tells UsMagazine.com, "This is just a case of conflicting schedules and their lives going in different directions. It was a totally mutual decision."

Kardashian, 28, started dating Bush, 24, in April 2007.