Kim Kardashian has shown off her incredible post-baby body online.

The 32-year-old reality TV star has been working extremely hard to shift the pounds she gained while pregnant with daughter North - her first child with boyfriend with Kanye West - pushing herself in the gym and sticking to the low carbohydrate Atkins Diet.

Kim is obviously pleased with the results of her efforts as she posted a revealing 'selfie' photo on her Twitter page, linking to her Instagram account, of her in a one-piece white swimsuit which showed off her impressive butt and small waist.

The Keeping Up with the Kardashians star captioned the sexy image ''#NoFilter'' a reference to the photo sharing website's image enhancing tools.

Many of Kim's followers commented on her incredible body, but it was her boyfriend Kanye who was most excited by what he saw replying from his Twitter account ''HEADING HOME NOW''.

Kim - who gave birth to North in June - is planning to release a diary which documents every stage of her post-pregnancy weight loss.