Robert Downey Jr. shared in his Instagram Story on Tuesday that he is giving away six of his vintage, eco-modified dream cars in a competition anyone can enter.

Downey Jr., 58, is collaborating with the Edward Charles Foundation to raise money for his climate tech venture capital company, FootPrint Coalition.

The “Iron Man” star posted a picture of himself dreamily sauntering next to his six cars, with the caption: “In case you haven’t heard yet, I’m giving away some of my cars…”

In the next slide, the actor informed the public how to enter and when the drawings will periodically take place, stressing that there’s “no purchase/donation required & making one will not increase chances of winning.”

Legal residents over 18 in the US, UK and Canada, excluding Quebec, can already begin submitting entries on the official website until July 16, 2024.

Robert Downey Jr. shared in his Instagram Story on Tuesday that he is giving away six of his vintage, eco-modified dream cars in a competition anyone can enter.

Instagram/Robert Downey Jr.

The first drawing will be held on Feb. 9, 2024, with a drawing taking place every month from then. The final drawing is on July 31, 2024.

While no purchase is required to enter, donations are converted into entries. The lowest set monetary donation, $10, equals 10 entries and the highest, $5,000, is 8,500 entries. All proceeds will go toward FootPrint Coalition’s nonprofit arm.

The official website for the sweepstakes calls the vehicles “beauties that we converted to drive to a pollution-free future.”

Downey Jr. shows off the climate-change-fighting modifications to six classic cars in his Max show “Downey’s Dream Cars.”

River / MEGA

The dream cars in question are a refurbished 1965 Chevrolet Corvette, a 1966 Buick Riviera, a 1969 Mercedes-Benz 280SE, a 1972 Chevrolet K10 Pickup, a 1972 Volkswagen Bus and a 1985 Chevrolet El Camino.

Downey Jr. shows off the climate-change-fighting modification to the classic rides in his Max show “Downey’s Dream Cars.”

The final two installments of the six-episode first season were released July 6.

A 1966 Buick Riviera, one of Robert Downey Jr.’s eco-modified dream cars.

RDJ Dream Cars Sweepstakes

Downey Jr.’s collection continues with a 1965 Chevrolet Corvette.

RDJ Dream Cars Sweepstakes

Another prized vehicle in the sweepstakes is a 1969 Mercedes-Benz 280SE.

RDJ Dream Cars Sweepstakes

The “Iron Man” star also owns a 1972 Chevrolet K10 Pickup.

RDJ Dream Cars Sweepstakes

A 1972 Volkswagen Bus, one of the vehicles featured in the Max show “Downey’s Dream Vehicles.”

RDJ Dream Cars Sweepstakes

A 1985 Chevrolet El Camino rounds out the “Oppenheimer” actor’s line-up of eco-modified classic rides.

RDJ Dream Cars Sweepstakes

The “Oppenheimer” star, who plays Lewis Strauss, chairman of the Atomic Energy Commission from 1953 to 1958, recently praised his co-star Cillian Murphy for his dedication to the movie.

Murphy, 47, plays J. Robert Oppenheimer, the father of the atomic bomb, in the Christopher Nolan-directed summer blockbuster.

“I have never witnessed a greater sacrifice by a lead actor in my career,” Downey Jr. told People.

“He knew it was going to be a behemoth ask when Chris called him,” he continued.

“But I think he also had the humility that is required to survive playing a role like this.”