Robert Downey Jr. made his first Marvel movie in 2008 and since then has been raking in the cash.

And with the tremendous success of the most recent Marvel Cinematic Universe (MCU) movie, "Avengers: Endgame," Iron Man himself is on pace to make the biggest salary of his long career.

According to The Hollywood Reporter, the 54-year-old actor made around $75 million for "Infinity War" because of a very unique financial arrangement he made with Marvel Studios' head, Kevin Feige.

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Downey Jr. gets backend pay, which means he gets a percentage of the film's box office success after it's released, according to THR. "Infinity War" made more than $2 billion worldwide and "Endgame" earned more than $1.2 billion in its first weekend alone, so it's safe to assume his final check will be massive.

The star also negotiated a staggering $5 million a day for three days of work on the 2017 blockbuster, "Spider-Man: Homecoming."

Other MCU stars who stand to make huge paydays are Scarlett Johansson in her upcoming "Black Widow" movie. She's reportedly making around $20 million for the film.

Meanwhile, Chris Hemsworth (Thor) and Chris Evans (Captain America) reportedly renegotiated their salaries for "Infinity War" and "Endgame" and are both making between $15 to $20 million per movie.

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Fans will also be seeing more of Elizabeth Olsen (Scarlet Witch), Anthony Mackie (Falcon), Sebastian Stan (Winter Soldier) and Jeremy Renner (Hawkeye), who have new deals for TV series on Disney's soon-to-launch streaming service.

There's also discussion about Chadwick Boseman (Black Panther) and Benedict Cumberbatch (Doctor Strange) returning in sequels to their original movies, and "Guardians of the Galaxy Vol. 3," which is set to start filming in 2020.