But on Tuesday Deacon spoke out on Twitter and said he believed “every single word” Clarke’s accusers had said about their allegedly “harrowing” experiences.
The 38-year-old Kidulthood star accused 45-year-old Clarke of sabotaging his career and gaslighting.
Deacon also said he had spoken out about Clarke’s “sociopathic” behaviour on several occasions, only to have his claims dismissed.
“I only wish that everyone had taken more notice of my words,” he continued, saying it might have stopped Clarke’s “horrific abuse of power.”
He said the events of the past week had served as “a small vindication” and that he was “now looking towards a fresh start.”
Deacon starred in Clarke’s film Kidulthood in 2006 and the 2008 follow-up Adulthood, but the pair have a complicated history.
After a public fall-out, Deacon was given a restraining order in 2015 after being convicted of harassing his former mentor.
Clarke has “vehemently” denied the harassment claims, writing in a statement: “In a 20-year career, I have put inclusivity and diversity at the forefront of my work and never had a complaint made against me.
“If anyone who has worked with me has ever felt uncomfortable or disrespected, I sincerely apologise.
“I vehemently deny any sexual misconduct or wrongdoing and intend to defend myself against these false allegations.”
Watch: Noel Clarke 'seeking professional help' after harassment claims - as ITV drops finale of his show