Reality TV star Kim Kardashian has called in a nutritionist to help her lose the last of the weight she gained while pregnant with baby daughter North.

The Keeping Up With the Kardashians star has battled hard to shed the pounds she piled on before she became a first-time mom in 2013, but she admits the last 15 pounds (6.8 kilograms) just aren't coming off, and so she has recruited an expert to get her diet on track.

In a candid new interview with news show Entertainment Tonight, she says, "I just started seeing a nutritionist... I eat really bad, but I've just started to try and eat really healthy and work out a little bit more, and just change my lifestyle."