This year, his big starring vehicle isnt quite as soothing.
[It was] more a devotion to getting this story right, he explains.
Hes put through the acting wringer: vomiting, passing out, sobbing until every tear is used up.

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Hardest to watch, however, is when Nic lies to the people he loves.
You dont like who I am now, Nic tells David in a wrenchingly acted moment by Chalamet.
The movie is encompassed in that scene, Chalamet suggests.

Francois Duhamel/Amazon Studios
Its also a scene that showcases the potent chemistry between the films two lead actors.
Yet Chalamet had a larger takeaway from observing his screen partner.
It was also the way [Steve] carried himself on set, he explains.
The role was presented [with] a juxtaposing mania, he says.
This would have made it a dream for any actor to play.
In Chalamets hands, its impossible to turn away.
Beautiful Boypremieres Sept. 7 at theToronto International Film Festival, before opening in select cities on Oct. 12.
Watch the trailer above, and see an exclusive still from the film below.