'Your Sister's Sister' Trailer Features Emily Blunt, Mark Duplass and Rosemarie DeWitt in a Love Triangle (Video)

It may have debuted last year, but the upcoming release of Your Sister's Sister is timed perfectly with the explosion of the careers of stars Mark Duplass and Emily Blunt.

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Mark Duplass and Lynn Shelton 'Your Sister's Sister'

Emily Blunt and Rosemarie DeWitt 'Your Sister's Sister'

In the new feature from Humpday director Lynn Shelton, Duplass plays a guy mourning the loss of his brother who is sent to recover at a remote vacation home by his best friend (and his brother's ex), played by Blunt. There he encounters Blunt's sister, played by Rosemarie DeWitt, who is coming out of a seven year lesbian relationship. After a night of drinking, the two end up in bed together -- which only sets off a long spell drama when the one-night stand comes to Blunt's attention.

FILM REVIEW: Your Sister's Sister

Duplass is already having a big year. He co-directed the well-received Jeff, Who Lives at Home, stars in the upcoming comedies Safety Not Guaranteed and and Darling Companion, and has another film called The Do-Deca Pentathlon, again directed with his brother Jay, premiering later this year. 

Blunt's bigger studio comedy, The Five-Year Engagement, premieres at Tribeca on Wednesday night, and she'll feature in Rian Johnson's sci-fi thriller Looper with Joseph Gordon-Levitt later in the year. Blunt also just starred in the comedy Salmon Fishing in the Yemen.