Trailer alert: Sundance favorite YOUR SISTER'S SISTER

Filmmaker Lynn Shelton had a comedy hit at this year’s Sundance Film Festival with YOUR SISTER’S SISTER, a surprising and compelling exploration of the rivalry between contrasting sisters. There is Iris (Emily Blunt), a flighty professional whose best friend, Jack (Mark Duplass), is still grieving the loss of his brother one-year prior. Iris, who used to date Jack’s brother, invites Jack to her family’s remote cabin in the woods to find himself. Unbeknownst to Iris, her older sister, Hannah (Rosemarie DeWitt), a lesbian fresh out of a seven-year relationship, is laying low at the cabin, and a rowdy night of tequila drinking between Jack and Hannah kicks off a bizarre stretch of days — made even more hilariously awkward when Emily pops in for an unexpected visit.

Check out the trailer:

Shelton’s last film, HUMPDAY, premiered at the 2009 Sundance Film Festival en route to a Special Jury Prize and critical raves. With YOUR SISTER’S SISTER, she proves herself a master of the mumblecore movie.

YOUR SISTER’S SISTER is in select theaters now. Click here to find a theater near you.

And in the meanwhile, take a look at our photo gallery with pictures from YOUR SISTER’S SISTER and watch more festival-favorite trailers!