Have you ever seen the 1990 American crime movie, the Goodfellas? It's my favorite!
I have not. What is it about? 
It's an adaptation of the book "Wiseguy". It's about the mob.
Is it true to the book? 
Yeah, more or less. The movie shows the rise and fall of the mob associated with Henry Hill. It's pretty exciting.
That sounds interesting. Is anyone famous in it?
in the film, Robert De Niro, Joe Pesci and Ray Liotta often spoke with Pileggi, who shared research material left over from writing the book. According to Pesci, improvisation and ad-libbing came out of rehearsals wherein Scorsese gave the actors freedom to do whatever they wanted. The director made transcripts of these sessions, took the lines he liked best and put them into a revised script, which the cast worked from during principal photography.
Made on a budget of $25 million, "Goodfellas" grossed $
Goodfellas
Goodfellas (stylized GoodFellas) is a 1990 American crime film directed by Martin Scorsese. It is an adaptation of the 1985 non-fiction book "Wiseguy" by Nicholas Pileggi, who co-wrote the screenplay with Scorsese. The film narrates the rise and fall of mob associate Henry Hill and his friends and family from 1955 to 1980.
Scorsese initially titled the film "Wise Guy" and postponed making it; later, he and Pileggi changed the title to "Goodfellas". To prepare for their roles