Robert Downey Jr. recalled the alternative final lines he suggested for Iron Man's character in "Avengers: Endgame," released in 2019.

"I had so many so many alt lines that I wanted to put forward...they were all super smart-a-s lines like I was trying," Downey Jr. said during his appearance on the Hypochondriactor podcast Wednesday.

The actor went on to share those lines, "Say stuff like 'you are so f-cked' or whatever... I was going to say 'oh snap!'... It was too smarta-s and the whole arc of the character."

However, the 56-year-old actor admitted that it was the writers' or the editors' idea to go back to the first installment of the "Iron Man" movie and get words from the origin.

"It was I think maybe one of our great editor's idea or maybe one of the writers who say that we need to go back to the first film and have his dying words to be the words of his origin," he added. "We love a bookend."

Director Anthony Russo - who co-directed the movie with Joe Russo - revealed last year they initially shot the last scene without any line but eventually decided to add the iconic line, "I am Iron Man."

Anthony said during the interview that "it was hard for him [Downey Jr.] to understand specifically where we were with the storytelling. When you're in the edit room, working every day with the material, you have a depth of understanding with it."

"You've explored it in every possible way. It doesn't mean a new idea can't hit you," he added. "By that point, we were really sure what [the scene] needed."

Moreover, the president of Marvel Studios, Kevin Feige also revealed that initially, Downey Jr. refused to reshoot the last part because it would be too emotional for him.

Finally, the actor reshot the part and it became one of the most iconic scenes in the movie.

On the work front, Downey Jr. will be next seen in a comedy sports drama, "All-Star Weekend," which is under post-production. He will also appear in the miniseries "The Sympathizer," which is under pre-production. The actor is currently filming, "Oppenheimer" with director Christopher Nolan.

Robert Downey, Jr.
"Iron Man" actor Robert Downey, Jr., pictured April 19, 2015. Getty Images