Watch: Emily Blunt & Rosemarie DeWitt in ‘Your Sister’s Sister’ Trailer

After playing at both the Toronto International Film Festival last year (read Alex’s review here) and Sundance earlier this year, Your Sister’s Sister, the quirky comedy from Humpday director Lynn Shelton has already garnered a decent amount of buzz. Now the film starring Emily Blunt, Rosemarie DeWitt and Mark Duplass (who also stars in another Sundance film Safety Not Guaranteed) is heading to theaters this summer and the first trailer has shown up online. Though Shelton has been called a mumblecore filmmaker, this film shows maturing in her style, and a sharp script with great performances. Here’s the first trailer for Lynn Shelton’s comedy Your Sister’s Sister from Yahoo! Movies: Lynn Shelton writes and directs Your Sister’s Sister, a comedy about an emotionally distraught man (Mark Duplass) still reeling from the death of his brother who ends up getting romantically involved with the sister (Rosemarie DeWitt) of his brother’s widow (Emily Blunt). …