William Mapother Biography: Net Worth, Siblings, Height, Parents, Age, Wife, TV Series, Films

William Reibert Mapother Jr., also known as William Mapother, is a talented American actor and entrepreneur, best known for playing Ethan Rom on the TV series Lost and Richard Strout in the film In the Bedroom.

With roles in both big-budget and indie films, he’s carved out a unique space in Hollywood.

William’s a proud American who brings intensity to his roles and supports new talent through his work with film festivals.

Profile

• Full Name: William Reibert Mapother Jr.
• Stage Name: William Mapother
• Born: April 17, 1965
• Age: 60 years old
• Birthplace: Louisville, Kentucky, USA
• Nationality: American
• Occupation: Actor, Voiceover Artist, Producer, Entrepreneur
• Height: 6 feet 1 inch (185 cm)
• Religion: Unknown
• Parents: William Reibert Mapother Sr, Louisa Riehm Mapother
• Siblings: Amy Mapother, Katherine Mapother
• Spouse: None
• Children: None
• Relationship: Single
• Net Worth: $1 million to $5 million

Early Life

William Mapother was born on April 17, 1965, in Louisville, Kentucky. His parents, Mr. William Reibert Mapother Sr., a lawyer and judge, and Mrs. Louisa Riehm Mapother, raised him in a family with deep roots. His ethnicity is American, with German, English, Irish, and Welsh ancestry, which he’s proud to carry. His religion isn’t publicly known.

William grew up with two sisters, Amy and Katherine, in a supportive home. His dad’s work as a judge between 1967 and 1970 gave the family a strong sense of community. As a kid, William loved sports and stories, but acting wasn’t his first path.

Education

William attended Saint Xavier High School in Louisville, an all-male college-prep school. He later studied at the University of Notre Dame, earning a Bachelor of Arts in English in 1987. After teaching, he trained at the Joanne Baron/D.W. Brown Acting School in Santa Monica, California, to hone his acting skills.

Career

William taught middle school in East Los Angeles for 3 years before pursuing acting. His first role was a small part in Born on the Fourth of July (1989), alongside his cousin Tom Cruise. He appeared in additional Cruise films, including Magnolia (1999), Mission: Impossible II (2000), and Minority Report (2002).

His big break came as Ethan Rom on Lost (2004–2010), appearing in 11 episodes as the creepy Other and earning a loyal fanbase despite limited screen time. William Shone starred in indie films like In the Bedroom (2001) as Richard Strout and Another Earth (2011) as John Burroughs. He’s played dark roles in The Grudge (2004), World Trade Center (2006), and The Atticus Institute (2015).

His TV work includes guest spots on CSI (2002), Law & Order: SVU (2003), NCIS (2004), Criminal Minds (2008), The Mentalist (2011–2014), and Supergirl (2016). In 2024, he played Angel in Outlaw Posse, and in 2025, he’s set to star in Suits LA as Greg Fisher and The Possession at Gladstone Manor as Henry Gladstone.

Social Media

• Instagram handle: @williammapother
• Facebook: William Mapother

Personal Life

William, 60, is single and lives in Los Angeles. He hasn’t shared details about past relationships, keeping his personal life private. His height is 6 feet 1 inch (185 cm), and he’s known for his blue eyes and light brown hair. He’s a certified scuba diver and loves photography, capturing landscapes on set.

William is close to his sisters, Amy and Katherine, both occasional actresses. He’s a philanthropist who speaks out against elder abuse and supports the Kentucky Film Commission. His cousin Tom Cruise helped him get early roles, but William’s proud to have built his own career.

Net Worth

William Mapother’s net Worth is estimated between $1 million and $5 million. His money comes from acting in films like In the Bedroom and Another Earth, TV roles in Lost and The Mentalist, and voice work in video games like Hitman and Fallout: New Vegas. His work with Slated and the production of films like On Sacred Ground (2023) also contributes to his income. His steady career has built a solid fortune.

Filmography (Selected):

• Born on the Fourth of July (1989) – Platoon Soldier
• Without Limits (1998) – Bob Peters
• Magnolia (1999) – WDKK Director’s Assistant
• Mission: Impossible II (2000) – Wallis
• In the Bedroom (2001) – Richard Strout
• Minority Report (2002) – Hotel Clerk
• The Grudge (2004) – Matthew Williams
• World Trade Center (2006) – Jason Thomas
• Moola (2007) – Bob
• The Burrowers (2008) – Will Parcher
• Another Earth (2011) – John Burroughs
• Citizen Gangster (2011) – Detective Rhys
• I Origins (2014) – Darryl
• The Atticus Institute (2015) – Dr. Henry West
• Blackhat (2015) – Rich Donahue
• On Sacred Ground (2023) – Daniel McKinney
• Outlaw Posse (2024) – Angel
• The Possession at Gladstone Manor (2025) – Henry Gladstone
• Suits LA (2025) – Greg Fisher

TV (Selected):

• CSI: Crime Scene Investigation (2002) – Douglas Sampson
• Law & Order: SVU (2003) – Luke Edmunds
• NCIS (2004) – Kyle Grayson
• Lost (2004–2010) – Ethan Rom
• Criminal Minds (2008) – Ian Corbin
• The Mentalist (2011–2014) – Richard Haibach
• Justified (2012) – Delroy Baker
• American Horror Story (2012) – Misogynist Driver
• Mad Men (2013) – Randall Walsh
• Supergirl (2016) – Rudy Jones / Parasite
• The Blacklist (2018) – Bill
• 9-1-1: Lone Star (2020) – Bruce Ackerman
• FBI: Most Wanted (2021) – Travis Russell