Martin Scorsese's film based on the book, I Heard You Paint Houses, tentatively titled The Irishman, is slated to star Robert De Niro, Joe Pesci, Al Pacino and maybe Harvey Keitel.

The film has been in the works for what seems like forever, but now some details are finally coming out, as De Niro recently confirmed on The Tonight Show with Jimmy Fallon. 

The book is your classic crime drama, basically about the life and times of famous american gangster Frank "The Irishman" Sheeran, who became a notorious mafia hit man after his service in World War II.

The title of the book is essentially the first words Jimmy Hoffa spoke to Sheeran. 

In mob lingo, "to paint a house" refers to killing somebody.

The film has no release date as of yet, but there's not a single gangster movie fan with taste that's not looking forward to it.

Check out the footage from The Tonight Show featuring Robert De Niro below.