Michael Landon Michael Landon

Mark Landon, the eldest son of Little House on the Prairie star Michael Landon, was found dead at his home on Monday. He was 60.

The cause of death has not been determined, but the Los Angeles Police Department does not suspect foul play, according to the Associated Press.

Mark Landon acted in three movies, including the 1991 TV movie Us, which was written and directed by his father. Michael Landon adopted Mark in 1956 after marrying his mother, Dodie Levy-Fraser.

The elder Landon passed away at the age of 54 from cancer, before Us aired.

Mark Landon's other credits include a role in 1986's Double Edge and 1997's Goodbye America.

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