The 34-year-old reality TV star stripped down to a leopard print bodysuit and treated her fans to a risque 'selfie' to honour the huge milestone on the photo-sharing site last night (26.02.15).
The picture shows the brunette beauty perched over the bed with her curvaceous butt and ample cleavage on full display in the sexy attire, which is complete with a plunging neckline and small thong.
She teamed the image with the caption: "27 mil!!!!! Thank you so much!!!! I love you all!!!!! (sic)."
Meanwhile, news that Kim - who has 20-month-old daughter North with her husband Kanye West - has hit 27 million subscribers on Instagram comes just hours after she and her family reportedly signed an impressive $100 million deal with the network E!.
Kim's mother Kris Jenner, 56, reportedly agreed a four-year contract extension with the channel, which will see "at least" four more seasons of 'Keeping Up with the Kardashians', spin-off shows and possible digital projects.
A source said recently: "You'll be seeing a lot more of the Kardashian family. This is a huge deal, which will see their involvement with the network and its digital properties expand well into the future."
See the gallery below for the selfie and other images of Kim Kardashian.