Kim Kardashian's 'grandpa robber' has died just a month after he was convicted of stealing jewellery worth $10 million from the reality television star.

Didier Dubreucq, 69, was diagnosed with lung cancer during pre-trial detention and had been undergoing chemotherapy.

He was among 10 suspects to be tried earlier this year for stealing jewels from the American influencer, including a huge diamond ring from her now ex-husband, rapper Kayne West.

Dubreucq, who police nicknamed 'Blue Eyes' due to his piercing gaze, was accused of being the second person who stormed into Kardashian's hotel room on the night of October 2-3, 2016, but he denied the charges.

A Paris court last month sentenced him to seven years in jail, including five suspended, over the robbery.