The Guvnors is the Rizzle Kicks singer's third film and Harley Sylvester gives a menacing performance of a London gang leader.
Based in South East London, the film is a violent thriller that sees two generations battle it out in a brutal conflict.
The singer-turned-actor said he quite enjoyed having the scar on his face for the role but did admit that it was hard to shake off his bad boy character during filming.
"There were a few points where I would get in [from filming] and my ex-girlfriend would be like, 'Harley cheer up'."
The film is out in UK cinemas now.