By Oliver Gettell
Updated October 09, 2015 at 10:25 PM EDT

With a script by Aaron Sorkin, it’s no wonder Steve Jobs is full of language. The Danny Boyle-directed drama starring Michael Fassbender as the charismatic, controversial Apple co-founder is constructed in three acts, each taking place before a major product launch — and each powered by whipcrack dialogue.

For the film’s cast, that meant extensive rehearsals to nail down the lines and cadences. Sorkin, Boyle, Fassbender, and several other cast members spoke to EW about the process during the recent Toronto International Film Festival.

“The thing with Sorkin’s dialogue is, if it’s 1 percent off — how you’re doing it, the rhythm of it — the whole thing is dogsh‑‑,” said Seth Rogen, who plays Steve Wozniak. “But when it finally clicks into place, it’s perfect, and it’s as though you’re just two people having a conversation.”

Kate Winslet, who plays Jobs’ confidant Joanna Hoffman, said, “Every scene in this film was abnormally long for a movie. The film script itself was 182 pages, so for Michael Fassbender, that’s pretty much like Hamlet times two.”

As for Fassbender, he was initially skeptical about portraying Jobs. “The first thing I said to Danny when I met him was like, ‘Well you know, I don’t really look anything like this guy,'” Fassbender recalled. “And Danny was like, ‘Well, that’s not what I’m interested in.'”

See more from the cast and crew of Steve Jobs in the clip above.