Dublin Oldschool writer and star Emmet Kirwan has said the film adaptation of his play shows "Ireland as it is".

Based on Kirwan's acclaimed play of the same name, Dublin Oldschool tells the story of Jason (played by Kirwan), an aspiring DJ whose no-tomorrow lifestyle takes another twist when he crosses paths with his estranged brother Daniel (played by Ian Lloyd Anderson), a homeless heroin addict.

Describing the film as "Dublin dipped in acid" on the Late Late Show, Kirwan told host Ryan Tubridy that "real art should show Ireland as it really is."

"This is Ireland as it is; it's the Dublin that I see every day," Kirwan added.

Dublin Oldschool is released on June 29

The cast of the film also includes Seána Kerslake, Sarah Greene and Mark O'Halloran with director and co-writer Dave Tynan previously describing his cast and crew as "extraordinary".

"I'm particularly proud I made it with the same gang I've been working with for years," said the filmmaker.

"It means an awful lot to me, too, that this film will be shown on the big screen. Raves and cinemas are communal experiences; I can't wait for crowds to see it in the dark together."

Dublin Oldschool hits cinemas on June 29.

Check out the trailer here: