Question: Which star of "A River Runs Through It" uses a name other than their given first name in the credits?

Context paragraphs:
Endang (name): Endang is a common given first name for women in Indonesia and occasionally for men.  Notable people with the first name Endang include:

Bhushan: Bhushan is an Indian given first name.  It may refer to:

A River Runs Through It (film): A River Runs Through It is a 1992 American period coming-of-age drama film directed by Robert Redford and starring Craig Sheffer, Brad Pitt, Tom Skerritt, Brenda Blethyn, and Emily Lloyd.  It is a based on the 1976 semi-autobiographical novel "A River Runs Through It" by Norman Maclean, adapted for the screen by Richard Friedenberg.  Set in and around Missoula, Montana, the story follows two sons of a Presbyterian minister, one studious and the other rebellious, as they grow up and come of age in the Rocky Mountain region during a span of time from roughly World War I to the early days of the Great Depression, including part of the Prohibition era.

Brad Pitt: William Bradley Pitt (born December 18, 1963) is an American actor and producer.  He has received multiple awards and nominations including an Academy Award as producer under his own company Plan B Entertainment.

Deuce Martinez: Deuce Martinez (born c. 1976) is an American intelligence professional.  "Deuce" is not his given first name, but a nickname that was used in the first newspaper article naming him.  He was involved at the start of the Central Intelligence Agency's Rendition, Detention and Interrogation program of "high-value detainees," including Abu Zubaydah, Ramzi bin al-Shibh, Abd al-Rahim al-Nashiri, and Khalid Sheikh Mohammed.

Zander (surname): Zander is a surname, a nickname for the name Alexander, and an uncommonly given first name, and may refer to:

Troy (given name): Troy is a male given first name used in English-speaking countries, and derives from the Irish Gaelic "Troightheach", meaning "foot soldier".  Troy can also be an informal form of the female name Gertrude (often shortened to Trude) in Dutch.  The name Troy may refer to:

Aashu: Aashu is a given first name in India.

Bakhtiar (name): Bakhtiyār (Persian: بختیار‎ ‎ meaning "lucky"), also spelled as "Bakhtyar", "Baxtiyar", "Bachtiar" and "Bahtiyar", is a Persian given first name for boys, popular in Iran, Turkey, Azerbaijan, Central Asia, Iraq, Russia, and amongst South Asian and South East Asian Muslims.

Sugrue: Sugŕue is an Irish surname, which is an anglicized form of the old Gaelic name Ó Siochfhrádha, meaning "descendant of Siochfhrádh", or Ó Siochŕu the modern Gaelic equivalent of Ó Sugŕue, which in turn is a Gaelic version of the old norse German given first name Siegfried, meaning "victory and peace".

Supporting paragraphs: A River Runs Through It (film) Brad Pitt
Answer: Brad Pitt