"Little House on the Prairie" star Melissa Gilbert shared a moving tribute to her co-star, Jack Lilley, who died at 91.

Landon, who died in 1991 at the age of 54, played Little Joe Cartwright in “Bonanza” and Charles Ingalls in “Little House on the Prairie,” among a slew of other iconic roles.

Melissa Gilbert paid tribute to her "Little House on the Prairie" co-star Jack Lilley in the wake of his death this week. The actor and stunt coordinator was 91. In a post on her Instagram account, Gilbert - who played Laura Ingalls Wilder in the show - called Lilley one of her "favorite people on the planet.