Kim Kardashian shows off her tiny waist in gym selfie

Kim Kardashian vowed to shed some weight and regain her pre-baby figure, and the reality TV star has been true to her word.

On Thursday, Kim posted a photo of herself at the gym, showing off her hourglass silhouette as she undertook 'waist training'.

"#hourglass #waisttraining #nophotoshopnecessary @premadonna87," Kim proudly wrote alongside the image of her reflection.

The 33-year-old looked picture-perfect in her workout gear, wearing her long brunette locks down and opting for an all-white outfit under the purple corset, which is designed to modify a person's figure and posture.

Kim's selfie of her svelte shape came after Us Weekly reported that the mum-of-one was nearer her ideal weight.

"She feels like she's reached her goal weight now," a friend told the magazine. "You can tell she slimmed down."

At the beginning of the month Kim lamented that she was struggling to lose the last of the baby weight she had gained while pregnant with daughter North West last year.

"Do any of u moms see their bodies just not the same? A different shape?" she tweeted. "Ughhhh my hips & butt are huge now! they were big to begin with!"