Actor Dylan O'Brien revealed the careful preparation behind his dual performance in "Twinless," where strategic production scheduling helped him create distinct identities for twin characters Rocky and Roman.

I hope that is not the fate of Twinless, a singular, beguiling film. Writer-director James Sweeney, who also co-stars, does trade in some of the stereotypical quirk and tic of Park City ephemera. But he deftly stitches those fabrics into something new,

Fifteen minutes before the world premiere of "Twinless," a dark comedy that sees "The Maze Runner" star playing a character who is grieving the loss of his twin brother, the actor was practically giddy as he talked about the film.

Sundance: James Sweeney levels up with this confident and extremely clever story about two boys who meet in a support group for siblings who've lost a twin.