Dylan O’Brien, who stars in the upcoming dark comedy Twinless, admitted he’s “fascinated” by the intriguing concept. The Sundance Film Festival contender explores the obsession between two grieving men who meet at a twin bereavement support group and form an unlikely connection.  Writer-director James Sweeney, who also stars alongside O’Brien, addressed whether the film is loosely based on the Olsen Twins’ lives. “I grew up in a generation that idolized twins. It was very much in my zeitgeist,” he admitted.  The film also features a scene in which a character watches the Olsen twins’ film It Takes Two. Sweeney explained that a twin can be a perfect manifestation of a best friend with whom you can share everything. And as a military brat who frequently switched places, Sweeney admitted he craved that connection growing up.  He confessed to having fantasies about magically running into his identical twin in the future. O’Brien, who plays Roman and his dead twin brother Rocky in the film, shared what aspect of the film interested him the most. “I’m fascinated …