
Casey Siemaszko (born Kazimierz A. Siemaszko) is a Polish-American actor and the brother of actress Nina Siemaszko. The son of a fighter in the Polish Underground who survived the Sachsenhausen concentration camp, Siemaszko narrated the 1998 feature, The Polish-Americans. Siemaszko was a graduate of the Goodman School of Drama at DePaul University in Chicago, which his sister, Nina Siemaszko later also attended. His acting career consists of smaller roles in dozen of popular films, including Back to the Future, Young Guns, Silence of the Heart, Of Mice and Men, Killing Kennedy, Back to the Future Part II and Stand By Me.

Back to the Future
1985 · as 3-D

Stand by Me
1986 · as Billy Tessio

Public Enemies
2009 · as Harry Berman

Back to the Future Part II
1989 · as 3-D

Young Guns
1988 · as Charley Bowdre

Secret Admirer
1985 · as Roger Despard

Biloxi Blues
1988 · as Don Carney

The Crew
2000 · as Young Bobby Bartellemeo

Milk Money
1994 · as Cash

The Phantom
1996 · as Morgan

Of Mice and Men
1992 · as Curley

Bliss
1997 · as Tanner

Class
1983 · as Doug

Napoleon
1995 · as Conan (voice)

Limbo
1999 · as Bobby Gastineau

Three O'Clock High
1987 · as Jerry Mitchell

Mistrial
1996 · as Detective Bobby Zito

American Harvest
1987 · as Dakota