"I want to apologize," Vallelonga said in a statement issued on Thursday night, reported variety.com.
"I spent my life trying to bring this story of overcoming differences and finding common ground to the screen and I am incredibly sorry to everyone associated with 'Green Book.' I especially deeply apologize to the incredibly brilliant and kind Mahershala Ali and all members of the Muslim faith for the hurt I have caused.
"I am also sorry to my late father who changed so much from Dr. Shirley's friendship and I promise this lesson is not lost on me. 'Green Book' is a story about love, acceptance and overcoming barriers, and I will do better," he added.
The tweet was from November 2015 when at a rally Trump had said: "Hey, I watched when the World Trade Centre came tumbling down. And I watched in Jersey City, New Jersey, where thousands and thousands of people were cheering as that building was coming down. Thousands of people were cheering."
The film's co-financer and producer Participant Media also released a statement, saying: "We find Vallelong''s Twitter post offensive, dangerous and antithetical to Participant Medi's values. We reject it in no uncertain terms."
Shirle''s family spoke out against the film, disputing its depiction of the events of the tour and stating they had not been contacted during production or conception.
Director Peter Farrelly, Mortensen, and Vallelonga have defended the film, which won Golden Globes on January 6 for best comedy or musical, best screenplay and supporting actor for Ali. The screenplay was written by Vallelonga, Brian Currie and director Peter Farrelly.
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