James Sweeney and Dylan O’Brien are Twinless in the new trailer

In Twinless, two young men meet in a twin support group and form an unlikely friendship. Roman (Dylan O’Brien) and Dennis (James Sweeney) both search for solace and an identity without their other halves and soon become inseparable outside the group. But when Roman meets Dennis’ ebullient co-worker, Marcie (Aisling Franciosi), all is revealed to be not what it seems, as each man harbours secrets that could unravel everything.

The film is written and directed by James Sweeney, who stars alongside Dylan O’Brien, Lauren Graham, Aisling Franciosi, Chris Perfetti, and Tasha Smith.

Lionsgate & Roadside Attractions will release Twinless in US cinemas on 5th September.