After avoiding answering questions about his work on the film out of "contractual obligations", Chalamet revealed on Instagram that he will be donating his salary from Allen's 2018 film 'A Rainy Day in New York' to charity.
In his post, he said he: "I don’t want to profit from my work on the film, and to that end, I am going to donate my entire salary to three charities: TIME’S UP, The LGBT Center in New York and RAINN.
"I want to be worthy of standing shoulder to shoulder with the brave artists who are fighting for all people to be treated with the respect and dignity they deserve."
Chalamet's donation follows that of fellow 'A Rainy Day in New York' actor Rebecca Hall, who on Friday apologised for taking part in the film and announced she was donating her salary to the Time's Up initiative.
They join a host of actors who have recently expressed regret at working with Allen, including 'Lady Bird' writer/director Greta Gerwig and Mira Sorvino.
Allen has been accused of sexual assault by his adopted daughter Dylan Farrow in the early '90s, allegations which Farrow and her family have stood behind and which can be read in this New York Times essay.
Allen has repeatedly denied the allegations.
You can read his post in full below.