Sean Astin is an American actor, voice actor, screenwriter, director, producer, author, marathon runner, political activist and philanthropist who is well known for his film debut portraying Mikey in Steven Spielberg’s The Goonies, for playing the title role in the critically acclaimed Rudy, and for his role as the beloved Sam Gamgee in the Academy Award winning trilogy, The Lord of the Rings: The Fellowship of the Ring, The Lord of the Rings: The Two Towers, and The Lord of the Rings: The Return of the King. He was also nominated for the Academy Award for Best Live Action Short Film in 1994 for the short film Kangaroo Court.
Birth Name
Sean Patrick Duke
Nickname
Sean
Profession
Actor, Producer, Director, Voice Artist
Nationality
American
Personal Life
Birthday / Date of Birth
Sean Astin was born on the 25th of February 1971, in Santa Monica, California, United States.
Age
He’s currently 55 years old.
Sun Sign
Pisces
Ethnicity
Mixed
Religion
Christianity
Education
Astin is a graduate of the Crossroads High School for the Arts in Santa Monica and completed master classes in acting at the Stella Adler Conservatory in Los Angeles. He attended Los Angeles Valley College before transferring UCLA, where he graduated cum laude with a bachelor of arts in history and English (American literature and culture).
Family Details
- Father – Michael Tell (Biological), John Astin (Stepfather)
- Mother – Patty Duke (Academy Award–winning actress)
- Siblings – Mackenzie Astin, Alexander Astin, and others
Marital Status
Married
Girlfriend / Spouse
Sean Astin has dated –
- Christine
Physical Statistics
Height
- In feet – 5 feet 6¼ inches
- In centimeters – 168 cm
- In meters – 168 m
Weight
- In Kilograms – 85 kg
- In Pounds – 187 lbs
Body Measurements
- Measurements – 36-14-42
- Waist – 36 Inches
- Biceps – 14 Inches
- Chest – 42 Inches
Body Build
Average
Eye Color
Blue
Hair Color
Light Brown
Shoe Size
He wears a size 9 (US) shoe.
Sexuality
Straight
Professional Statistics
Famous For
Astin is best known for portraying Samwise Gamgee in The Lord of the Rings trilogy, Mikey Walsh in The Goonies, Rudy Ruettiger in Rudy, and Bob Newby in Stranger Things. He is widely admired for portraying loyal, courageous, and emotionally resonant characters. He served as a campaign manager to Dan Adler in California’s thirty-sixth congressional district special election.
Television Debut
In 1981, Sean made his television debut in television film Please Don’t Hit Me, Mom as Brian Reynolds.
Film Debut
In 1985, Astin made his feature film debut in The Goonies as Michael “Mikey” Walsh.
Sean Astin Net worth
Sean Astin has an estimated net worth of $8 million dollars as of 2026.
Social Media Profiles
- Facebook – Sean Astin
- Instagram – seanastin
- X – Sean Astin
Some Lesser Known Facts About Sean Astin
- Astin is the son of legendary actress Patty Duke. At the time of his birth, his biological father was believed to be entertainer Desi Arnaz Jr., but Astin discovered through a DNA test in the 1990s that his biological father is music promoter Michael Tell.
- At age nine, Sean starred with his mother in the after-school special Please Don’t Hit Me, Mom (1981). Followed by Sean’s feature debut The Goonies (1985) and since then, he has had a steady stream of roles. Starring in Toy Soldiers (1991), Where the Day Takes You (1992), Rudy (1993) and Harrison Bergeron (1995).
- He directed and co-produced the short film Kangaroo Court (1994), which was nominated in the best short film category at The 67th Annual Academy Awards (1995). Sean’s adoptive father John Astin was nominated for the same award in 1969.
- Sean experienced another career breakthrough with his role as the epitome of loyal sidekicks, Samwise Gamgee, in Peter Jackson’s “The Lord of the Rings” trilogy, released in 2001, 2002 and 2003.
- In 2004, he authored the NY Times best seller “There and Back Again: An Actor’s Tale,” chronicling his acting career with emphasis on his experiences filming the Lord of the Rings trilogy.
- Sean has been a long-distance runner since his teens. He successfully completed the Ironman World Championship Triathlon in Kona, Hawaii, in October 2015; the grueling event consisted of a 2.4 mile open ocean swim, a 112 mile bike race and a 26.2 mile marathon.
- He has served as a philanthropist on the board of several non-profit organizations, including the Creative Coalition, National Center for Family Literacy, and Los Angeles Valley College’s Patrons Association and Arts Council.
- Sean has been very active having served in two non-partisan Presidential appointments. Sean also hosts a live weekly 2 hour in-studio bi-partisan political radio talk show, ‘Vox Populi Radio’ which was made possible by a successful crowdfunding campaign in 2013.
- In addition to acting in live action films and television, Sean is also an accomplished voice actor. He has voiced several different characters in animated series, cartoons, animated movies, anime dubs and video games.
- From November 2024 to January 2025, he made his Broadway debut as Santa Claus in a revival of Elf the Musical, which ran at the Marquis Theatre.
- On September 12, 2025, Astin was elected president of SAG-AFTRA for a two-year term, receiving 79.25% of the vote from participating SAG-AFTRA members.
Frequently Asked Questions
Who is Sean Astin?
He is an American actor, voice actor, screenwriter, director, producer, author, marathon runner, political activist and philanthropist.
What is the real name of Sean Astin?
His real name is Sean Patrick Duke.
What is the age of Sean Astin?
He is 55 years old (25th of February 1971).
What is Sean Astin Height?
The Height of Sean is 1.68 m (5′6¼”).
What is Sean Astin Educational Background?
He is a graduate of the Crossroads High School for the Arts in Santa Monica and completed master classes in acting at the Stella Adler Conservatory in Los Angeles. He attended Los Angeles Valley College before transferring UCLA, where he graduated cum laude with a bachelor of arts in history and English (American literature and culture).
What is Sean Astin Known For?
He is best known for portraying Samwise Gamgee in The Lord of the Rings trilogy, Mikey Walsh in The Goonies, Rudy Ruettiger in Rudy, and Bob Newby in Stranger Things.
What is the Net worth of Sean Astin?
He has an estimated net worth of $8 million dollars as of 2026.