Cast of Witness

Harrison Ford plays Det. Capt. John Book, an honest and dedicated detective who protects a young Amish boy after he witnesses a murder.

Kelly McGillis portrays Rachel Lapp, a young Amish widow and mother who finds herself drawn to Det. John Book.

Josef Sommer takes on the role of Chief Paul Schaeffer, Book's superior who becomes involved in the case.

Lukas Haas plays Samuel Lapp, Rachel's young son who witnesses a murder and is protected by Det. John Book.

Jan Rubeš portrays Eli Lapp, Rachel's father, and a respected member of the Amish community.

Alexander Godunov plays Daniel Hochleitner, a man from Rachel's past who complicates her life.

Danny Glover appears as McFee, a corrupt police officer involved in the murder witnessed by Samuel.

Brent Jennings portrays Carter, a colleague of Det. John Book who helps in the investigation.

Patti LuPone plays Elaine, a character involved in the narrative surrounding the murder witnessed by Samuel.

Angus MacInnes appears as Fergie, a character involved in the events surrounding the murder in the film.

Frederick Rolf portrays Stoltzfus, a member of the Amish community who plays a role in the story.

Viggo Mortensen appears as Moses Hochleitner, a character connected to Rachel's past and the unfolding events.