Question: What American actress portrays Barbara "Barb" Dutton Henrickson is a character on HBO's "Big Love"?

Context paragraphs:
Big Love: Hymnal: Big Love: Hymnal – Music Written for the HBO Series Plus Other Recent Compositions is a soundtrack album by David Byrne including music composed for the HBO television drama "Big Love" released on August 19, 2008.  Byrne has written on his journal that it is not "a pop record by any stretch," but a soundtrack featuring lush instrumentation, including horns and strings, with minimal percussion.  It is the first release by Byrne's independent record label Todo Mundo, although "Everything That Happens Will Happen Today" was released in digital format one day prior to "Big Love: Hymnal".

Nicolette Grant: Nicolette Eugenia "Nicki" Grant is a character in "Big Love", the HBO television series set among contemporary polygamists in Utah.  The role is played by Chloë Sevigny.  The show focuses on the family of Bill Henrickson; Nicki is the second of Henrickson's three wives, and the biological mother to two of Henrickson's children, Wayne and Raymond.

Jeanne Tripplehorn: Jeanne Marie Tripplehorn (born June 10, 1963) is an American film and television actress.  Her film career began with the role of a police psychologist in the erotic thriller "Basic Instinct" (1992).  Her other film roles include "The Firm" (1993), "Waterworld" (1995) and "Sliding Doors" (1998).  On television, she starred as Barbara Henrickson on the HBO drama series "Big Love" (2006–11) and as Dr. Alex Blake on the CBS police drama "Criminal Minds" (2012–14), and she received a Primetime Emmy Award nomination for her performance as Jacqueline Kennedy Onassis in the 2009 HBO movie "Grey Gardens".

Sarah Henrickson: Sarah Elizabeth Henrickson is a character on the HBO series "Big Love".  She is portrayed by Amanda Seyfried.  Sarah is the eldest child of Bill Henrickson with his first and legal wife Barbara Henrickson.  Though only a supporting character in the first two seasons, Sarah became popular in the show in its third season until actress Amanda Seyfried decided to depart the show to focus on her movie career at the end of season four.  She returned in the series finale in the last scene.

Douglas Smith (actor): Douglas Alexander Smith (born June 22, 1985) is a Canadian-American actor most notable for his work on the HBO series "Big Love" as Ben Henrickson, the eldest son of polygamist Bill Henrickson, as well as his role as Elliot in "The Bye Bye Man".

Barbara Henrickson: Barbara "Barb" Dutton Henrickson is a character on HBO's "Big Love" portrayed by Jeanne Tripplehorn.  Barb is the first wife of Bill Henrickson.  Barb was raised in a traditional Mormon family, outside polygamy.  Bill and Barb met while in college, and married soon afterwards.  Together, they had three children.  Barb almost died of uterine cancer after the birth of Tancy "Teeny" Henrickson, the youngest of Barb's children, right before Bill married his second wife Nicolette "Nicki" Grant and later, his third wife Margene Heffman.

Ben Henrickson: Benjamin "Ben" Henrickson is a character on the HBO series Big Love.  He is portrayed by Douglas Smith.  Ben is the second child and oldest son of Bill Henrickson with his first and once legal wife, Barbara Henrickson.  As of "The Lost Boys", he is 17 years old.  He becomes a priesthood holder in season 2.

Bill Henrickson: William Orville "Bill" Henrickson is a fictional character in the HBO series "Big Love", portrayed by Bill Paxton.  The protagonist of the series, he is the head of a polygamous family.  He is married to three wives, Barbara Henrickson, Nicolette Grant and Margene Heffman.  He has fathered eight children with these three women.

Margene Heffman: Margene "Margie" Heffman is a character on "Big Love", the fictional HBO television series set among contemporary polygamists in Utah.  The role is played by Ginnifer Goodwin.  The show focuses on the family of Bill Henrickson; Margene is the third of Henrickson's three wives, and the biological mother of three of Henrickson's children: Aaron, Lester, and Nell.

List of Big Love episodes: "Big Love", an American drama television series created by Mark V. Olsen and Will Scheffer, premiered on HBO March 12, 2006.  The series revolves around Bill Henrickson (Bill Paxton), a polygamist living in Sandy, Utah with his three wives, Barb (Jeanne Tripplehorn), Nicki (Chloë Sevigny) and Margene (Ginnifer Goodwin) and their children.  Bill struggles to maintain a happy family life whilst keeping their illegal lifestyle a secret.  "Big Love" aired its fifty-third and final episode on March 20, 2011.

Supporting paragraphs: Barbara Henrickson Jeanne Tripplehorn
Answer: Jeanne Tripplehorn