Reality TV star Kim Kardashian, who flaunted platinum blonde locks at the Paris Fashion Week earlier this month, may have gone back to a dark hair colour.

The star shared an image on Twitter with photographer Ellen Von Unwerth, and it clearly shows Kim with her signature dark locks, reports mirror.co.uk

The 34-year-old wrote: "On set a few days ago with the amazing @ellenvonunwerth. Can't wait for you to see the projects we've been working on!"

However, considering the surprises that the reality TV star keeps throwing up, it could easily just be a wig for the shoot.

But photographs showing her seated behind the wheel of her car on Friday indicated that the star's hair colour has changed -- she is seen checking her reflection on the rear view mirror.

On March 17, Kim's makeup artist Mario Dedivanovic shared a picture of Kim on Instagram showing the curvaceous backside of the star with the caption, `Brunette vibes on set. Guess who?`