Leonardo DiCaprio attending the 92nd Annual Academy Awards. TNS.

Die-hard fans of Leonardo DiCaprio now have a once-in-a-lifetime opportunity to get up close and personal with the megastar.

The "Once Upon a Time in Hollywood" actor has offered fans the chance to appear in Martin Scorsese’s next film alongside him and Robert De Niro.

Yes you read right! An opportunity to hobnob with not one, but three cine idols.

The opportunity is part of the All In Challenge, in which celebrities auction experiences to raise funds for the elderly, children and frontline workers amid the coronavirus pandemic.

In an Instagram post, DiCaprio announced that he was offering one fan the chance to get a walk-on role in the upcoming film, "Killers of the Flower Moon."

The winner will also get to spend a day on the set with DiCaprio, De Niro and Scorsese and will be invited to the movie’s premiere.

“If you’ve ever wondered what it’s like to be able to work with the great @martinscorsese_, Robert De Niro and myself, this is your chance,” DiCaprio said.

“Robert and I are going to be starring in a new movie called ‘Killers of the Flower Moon,’ directed by Martin Scorsese. We want to offer you a walk-on role, the opportunity to spend the day on the set with the three of us, and attend the premiere.”

To enter the competition, fans need to head to allinchallenge.com and donate whatever they can.

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The All In Challenge sees stars nominate each other to join the cause, with donations sent to Meals on Wheels America, No Kid Hungry and America's Food Fund.

DiCaprio and De Niro challenged Matthew McConaughey, Ellen DeGeneres and Jamie Foxx.

Other All in Challenge auctions include the chance for Justin Bieber to sing “One Less Lonely Girl” at the winner’s home and the opportunity to be in Kevin Hart’s next movie.

“Killers of the Flower Moon” is based on David Grann’s bestselling book about the FBI’s investigation into the 1920s Osage murders that saw the slayings of Native Americans.