Cast of August: Osage County

Julia Roberts plays Barbara Weston, the eldest Weston daughter who is strong-willed and trying to cope with her strained marriage and her mother's illness.

Meryl Streep portrays Violet Weston, the sharp-tongued, cancer-stricken matriarch of the Weston family whose dependency on drugs leads to family conflicts.

Julianne Nicholson plays Ivy Weston, the middle daughter who, unlike her sisters, chose not to leave the family home and has her own set of secret struggles.

Juliette Lewis takes on the role of Karen Weston, the self-deluding youngest daughter who returns home with new fiancé, unaware of the family's escalating issues.

Ewan McGregor plays Bill Fordham, Barbara's estranged husband, a college professor who is trying to deal with the separation and his daughter's rebelliousness.

Margo Martindale appears as Mattie Fae Aiken, Violet's sister and Charlie's wife, whose tough love approach towards her son conceals a deeper secret.

Abigail Breslin plays Jean Fordham, the fourteen-year-old daughter of Barbara and Bill, who is struggling with typical teenage issues amidst her family's chaos.

Chris Cooper takes the role of Charlie Aiken, Mattie Fae's affable husband, who tries to maintain peace within the family and show support for his son.

Dermot Mulroney plays Steve Huberbrecht, Karen's slick, somewhat sleazy fiancé, whose inappropriate behavior adds to the family tension.

Benedict Cumberbatch portrays Little Charles Aiken, the sensitive, perceived underachiever son of Mattie Fae and Charlie, longing for acceptance.

Misty Upham plays Johnna Monevata, the introverted Cheyenne woman hired to take care of the Weston family's ailing matriarch, Violet.

Sam Shepard is Beverly Weston, the patriarch of the Weston family and a once-famous poet, whose disappearance triggers the family reunion.