'The Irishman' shows younger Al Pacino, Robert DeNiro

While it had long been confirmed Pacino and DeNiro would be de-aged in the film, we were unaware of this plan's ambitiousness.

Now Thelma says, "We're youthifying the actors in the first half of the movie. And then the second half of the movie they play their own age. So that's a big risk. We're having that done by Industrial Light and Magic, ILM".

Thelma reiterated about the project's expense and how Netflix was taking a big risk.

Speaking of the risky de-aging process, Thelma said, "But I haven't gotten a whole scene where they're young, and what I'm going to have to see, and what Marty's going to have to see is, 'How is it affecting the rest of the movie when you see them young?'"

For those unaware, de-aging is a visual technique used in movies to make actors look younger for flashback scenes.

Notably, fans might remember seeing a younger Robert Downey Jr. as Tony Stark in the Marvel movies.

However, de-aging is mostly used for short scenes, unlike the prolonged first half of The Irishman, and even then it is not a 100% convincing visual effect.

While Scorsese's upcoming film has this writer excited as Joe Pesci, Al Pacino and Robert DeNiro appear in a movie, Thelma's news is cause for concern.

With the film months away from release, the fact that neither Thelma nor Scorsese have viewed a single scene of The Irishman with the de-aging technology is indeed worrying.

Hopefully, the production does not run out of time.