Paris, France - A group of suspects nicknamed the "grandpa robbers" goes on trial at the end of April, charged with stealing jewelry worth millions from reality TV star Kim Kardashian while she was in Paris.

In what the French press has called "the heist of the century," masked men walked away from the luxury Parisian hotel where Kardashian was staying in October 2016 with millions of dollars worth of jewels, including a diamond ring gifted by her then-husband, rapper Kanye West.

Kardashian will testify in person at the trial, which opens on April 28, her US lawyer Michael Rhodes said last week.

Ten people will be in the dock and the verdict is expected on May 23, with Kardashian set to appear on May 13, according to a provisional schedule.

Miley Cyrus Billy Ray Cyrus hard-launches romance with this Hollywood star – his new love interest revealed!

In what has been called the biggest French hold-up targeting an individual in 20 years, Kardashian was robbed of jewelry estimated at 10 million euros ($11.4 million) while she was staying at a luxury residence during Paris fashion week.

Among the suspects arrested four months later in Paris and in the south of France is 68-year-old Aomar Ait Khedache – known as "Old Omar" – who has admitted to his participation in the heist, but denies the prosecution's accusation that he was also the ringleader.

Two investigating magistrates ordered the suspects to stand trial by jury (which in France is reserved for the most serious crimes) on charges including armed robbery, kidnapping, and membership of a criminal gang.

On the night of October 2-3, 2016, several men, some impersonating police officers, entered the hotel where Kardashian was staying during Fashion Week.

The star had attended a Givenchy show before returning to the hotel around midnight without her bodyguard, who accompanied her sister Kourtney Kardashian as she had gone clubbing.

Two of the intruders put guns to her head and one, Kardashian later told detectives, addressed her "with a very strong French accent" in English, telling her to hand over her diamond engagement ring.

That ring from West, which the influencer had shown off extensively on social media, was estimated to be worth four million dollars.

The intruders then tied her up, gagged her, and carried her into the bathroom.

Three men meanwhile kept watch at the reception, with one waiting at the wheel of a getaway car.

The entire robbery lasted around 10 minutes.

Kardashian's frequent posts about her wealth, personal life, and whereabouts may have facilitated the perpetrators' actions.

In addition to the ring, which featured a near-flawless 18.88-carat diamond, the group made off with several more pieces of gold and diamond jewelry, including a gold Rolex watch.

One of the alleged robbers, Yunice Abbas, now 71, dropped a diamond-encrusted cross worth 30,000 euros while fleeing the scene on a bicycle. The cross was found by a passer-by a few hours later.

The suspected thieves lost a few more items while on the run, but the bulk of the bounty has never been found and is believed to have been sold in Belgium.

Abbas later wrote a book, titled "I Kidnapped Kim Kardashian" – despite also claiming that he was just one of the lookouts without laying eyes on the star.

Another suspect, 69-year-old Didier Dubreucq, also came to the scene by bike and is accused of having been in Kardashian's room, which he denies.

The aging suspects had, according to prosecutors, hoped to make a criminal comeback with the heist.

The suspects were identified mostly thanks to their DNA.