William Mapother

Actor
Writer
Producer

A journalist and oil company executive find themselves on opposite sides of the fight during the construction of the contentious Dakota Access Pipeline that runs through the Standing Rock Indian Reservation in North Dakota.

Play trailer1:52

On Sacred Ground (2023)

William Mapother was born on April 17, 1965 in Louisville, Kentucky, USA as William Reibert Mapother Jr. He graduated from the University of Notre Dame with a B.A. in English. He is the co-founder of the film finance marketplace Slated. He is known for his work on Lost (2004), In the Bedroom (2001) and Another Earth (2011).

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IMDbProStarmeter Top 5,000158

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Awards
- 2 nominations total

Photos47

+ 43

Known for

Naveen Andrews, Adewale Akinnuoye-Agbaje, Daniel Dae Kim, Emilie de Ravin, Matthew Fox, Jorge Garcia, Josh Holloway, Yunjin Kim, Dominic Monaghan, Terry O'Quinn, Harold Perrineau, Michelle Rodriguez, Cynthia Watros, Maggie Grace, and Evangeline Lilly in Lost (2004)

Lost

8.3

TV Series

Dr. Ethan Rom
Dr. Ethan Goodspeed

In the Bedroom

7.4

Richard Strout

2001

Another Earth

6.9

John Burroughs

2011

The Mentalist

8.2

TV Series

Richard Haibach

Credits

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IMDbPro

Actor

Suits LA
5.7
TV Series
- Greg Fisher
- 2025
Outlaw Posse
4.3
- Angel
- 2024
Black Girl Missing
5.6
- Russell
- 2023
On Sacred Ground
5.4
- Daniel McKinney
- 2023
A Little Dream
TV Mini Series
- Wayne
- 2021
FBI: Most Wanted
6.9
TV Series
- Travis Russell
- 2021
Son of Monarchs
6.1
- Bob
- 2020
9-1-1: Lone Star
7.3
TV Series
- Bruce Ackerman
- 2020
Save Me
8.0
TV Series
- Sonny Moore
- 2020
Lethal Weapon
7.8
TV Series
- Jacob Porter
- 2018
The Blacklist
7.9
TV Series
- Bill
- 2018
MacGyver
5.5
TV Series
- Daniel Holt
- 2017
Supergirl
6.2
TV Series
- Dr. Rudy Jones
- Parasite
- 2016
Tell Me How I Die
5.0
- Dr. Jerrems
- 2016
Powers
6.6
TV Series
- Todd Secor
- 2016

Writer

Producer

In-development projects at IMDbPro

Verified affiliations

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Videos26

Clip 1:28

"We Have to Celebrate"

Personal details

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Official site
- Official Site
Alternative name
- William R. Mapother
Height
- 6′ 1″ (1.85 m)
Born
- April 17
- Louisville, Kentucky, USA
Parents
- Louisa Riehm Mapother
Relatives
Other works
Voice: CircleRound podcast. Stage (2008+): Glengarry Glen Ross, Actor's Theatre of Louisville; Boats on a River, L.A. Theatreworks; Tape, L.A. Theatreworks.

Self-verified on IMDbPro

Gender / Gender identity
- Male
Pronouns
- he/him

Did you know

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Trivia
Younger cousin of Tom Cruise and Lee Anne De Vette.

Quotes
I never really worried about it. As I've amassed a body of work, the questions about Tom have gone away. I figured that if I did good work, I'd be seen for what I am. - talking about his famous cousin, Tom Cruise.