Casey Siemaszko: Life, Career, and Famous Roles Explained (2025)

Casey Siemaszko was born on March 17, 1961.Casey Siemaszko is a talented actor whose career has spanned over three decades, leaving an indelible mark on the film industry with his memorable performances.

Born in Chicago to Polish immigrant parents, Siemaszko’s upbringing was deeply influenced by his father’s harrowing experiences during World War II. He first gained recognition in the 1980s with his role as 3-D in the iconic film “Back to the Future,” which propelled him into the spotlight and established him as a reliable character actor.

Throughout his career, Siemaszko has showcased his versatility, taking on a range of roles in both film and television, from heartwarming dramas to quirky comedies. Despite not being a household name, his contributions to beloved films such as “Stand by Me” and “Young Guns” have earned him a devoted fan base.

Casey Siemaszko Biography/wiki

FieldDetails
Full NameKazimierz A. “Casey” Siemaszko
Date of BirthMarch 17, 1961
Place of BirthChicago, Illinois, USA
NationalityAmerican
ProfessionActor
Years Active1983–present
Famous Roles3-D in Back to the Future (1985), Curley in Of Mice and Men (1992)
Notable FilmsBack to the Future series, Young Guns, Stand By Me
Television WorkLaw & Order, Billions
EducationDePaul University (Bachelor of Fine Arts)
FamilySister: Nina Siemaszko (actress)
Father’s BackgroundPolish Resistance fighter during WWII
AwardsN/A (Known for consistent roles in popular films)
Net WorthEstimated $500,000 – $1 million

Who Is Casey Siemaszko ?

Casey Siemaszko is an American actor born on March 17, 1961, in Chicago, Illinois. He started his career in the early 1980s and quickly became known for his memorable roles. His breakout role came in 1985 as 3-D in “Back to the Future.”

With Polish immigrant parents and a deep cultural heritage, Siemaszko’s upbringing influenced his career choices. Over the years, he has demonstrated remarkable versatility, appearing in both film and television. Known for playing tough or quirky characters, Siemaszko has left a lasting impression on audiences, making him a respected figure in Hollywood.

Casey Siemaszko: Life, Career, and Famous Roles Explained (1)

Casey Siemaszko Early Life and Family

Casey Siemaszko was raised in a culturally rich environment in Chicago. His father, a Polish resistance survivor, profoundly influenced his upbringing. His mother, Collette McAllister, also of Polish descent, contributed to his strong cultural roots.

Siemaszko attended St. Ignatius College Prep, where his interest in acting began to flourish. Growing up with stories of resilience and heritage, he was inspired to pursue drama at DePaul University’s Goodman School of Drama. This family background not only shaped his worldview but also added depth to his acting career, allowing him to bring authenticity to his diverse roles.

Casey Siemaszko Amazing Career

Casey Siemaszko began his acting career in the early 1980s. He first gained recognition for his role as 3-D in “Back to the Future.” His versatility allowed him to take on various roles, from tough guys to quirky characters.

Notable performances include Billy Tessio in “Stand by Me” and Charlie Bowdre in “Young Guns.” He also portrayed Curley in “Of Mice and Men.” Siemaszko made guest appearances on TV shows like “NYPD Blue” and “Law & Order.” His ability to adapt to different genres made him a respected actor in Hollywood.

Casey Siemaszko: Life, Career, and Famous Roles Explained (2)

Casey Siemaszko Height, Weight, and Physical Appearance

AttributeDetails
Height5 feet 8 inches (173 cm)
WeightApprox. 154 lbs (70 kg)
Hair ColorLight Brown
Eye ColorBlue
BuildAverage
Distinct FeaturesOften seen with short haircuts

Casey Siemaszko Husband/Boyfriend And Relationship

Casey Siemaszko has largely kept his personal life away from the public eye. Details about his romantic relationships or marital status are not widely known. His preference for privacy means there is limited information available about his love life.

Despite being in the public eye for his career, Siemaszko has managed to maintain a low profile regarding his relationships. This choice adds an element of mystery to his persona, allowing fans to focus more on his work and less on his personal affairs. His discretion has kept his romantic life out of the spotlight.

Casey Siemaszko: Life, Career, and Famous Roles Explained (3)

Casey Siemaszko Net Worth

YearNet WorthIncome
2023$500,000 – $1 MillionUnder Review
2022$500,000 (estimated)Under Review

Casey Siemaszko Future Plan and Goals

Casey Siemaszko continues to embrace new opportunities in both film and television. He remains passionate about exploring diverse roles that challenge his acting abilities. Looking ahead, he aims to work with innovative directors and storytellers. Siemaszko is also interested in voice acting and participating in animated projects.

Additionally, he hopes to mentor young actors, sharing his extensive industry experience. His dedication to the craft of acting remains unwavering, and he is excited about future collaborations. Casey is committed to leaving a lasting impact on the entertainment world while continuously evolving as an artist.

Casey Siemaszko on Social Media

PlatformUsernameFollowersLink
InstagramNot publicly activeN/AN/A
Twitter (X)Not publicly activeN/AN/A
FacebookNot publicly activeN/AN/A
Other PlatformsNot publicly listedN/AN/A

Fun Facts about Casey Siemaszko

  • Polish Heritage:

His full name is Kazimierz Andrew Siemaszko.

  • Back to the Future:

Played 3-D, known for his glasses.

  • Sibling Stars:

His sister Nina is also an actress.

  • Voice Talent:

Worked in animated series and video games.

  • War Stories:

His father was a Polish resistance fighter.

  • Drama School:

Graduated from DePaul University’s Goodman School of Drama.

  • Private Life:

Keeps personal life mostly out of the spotlight.

Casey Siemaszko Video and Images

Casey Siemaszko: Life, Career, and Famous Roles Explained (4)

Frequently Asked Questions Casey Siemaszko

Who is Casey Siemaszko?

Casey Siemaszko is an American actor known for his versatile roles in both film and television. Born on March 17, 1961, in Chicago, Illinois, he gained fame for his roles in iconic 1980s films. His breakout roles include Back to the Future, Stand by Me, and Young Guns. He has also had significant success in TV series like NYPD Blue. His talent and adaptability have earned him a respected place in Hollywood.

What are Casey Siemaszko’s most famous roles?

Casey is best known for his roles in Back to the Future (as 3-D, one of Biff’s gang members), Stand by Me, and Young Guns. His role in Three O’Clock High is also a standout, where he played the lead character, Jerry Mitchell. He has portrayed various character types, ranging from sidekicks to leading men. These roles have made him a beloved actor of the 1980s and 1990s. His work continues to resonate with fans of classic films.

What is Casey Siemaszko doing now?

In recent years, Casey Siemaszko has mostly taken on smaller roles in film and television. He has also done voice work, including narrating audiobooks, and remains active in the entertainment industry. While he may not be as prominently featured as he was in the 1980s, he continues to work steadily. Fans still appreciate his performances in classic films. Casey has largely kept his personal life private, staying out of the public spotlight.

What is Casey Siemaszko’s net worth?

As of 2024, Casey Siemaszko’s estimated net worth is around $500,000 to $1 million. His wealth has been accumulated through his long-standing acting career, which includes roles in several box-office hits. Though he hasn’t had as many recent blockbuster roles, his earlier work has continued to be popular. Additionally, his ongoing work in smaller roles and voiceovers has kept him financially stable. His reputation as a reliable actor has ensured steady work throughout his career.

conclusion about Casey Siemaszko

Casey Siemaszko’s career reflects his adaptability and dedication. Known for his roles in iconic films, he consistently delivered memorable performances. His background, influenced by his Polish heritage and father’s resilience, enriched his acting.

Siemaszko’s ability to play a wide range of characters, from tough guys to quirky figures, underscores his versatility. He remains passionate about exploring diverse roles, aiming to mentor young actors.

Though he keeps his personal life private, his work continues to resonate with audiences. Casey Siemaszko’s legacy is marked by his contributions to the film industry and his commitment to his craft.

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Casey Siemaszko: Life, Career, and Famous Roles Explained (2025)
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