An accomplished horseman in his spare time, Mortensen requested that his "Rings" character Aragorn be given more saddle time than was originally scripted.
He also kept his on-screen horse nearby during the entire principal photography schedule in order to ride in his off-hours and strengthen his relationship with the horse.
Although their divorce only became final in 1998, he and his former wife, Exene Cervenka, separated in late 1990/early 1991 after less than 3 years of marriage but remain close friends often working together and co-parenting their son.
Is one of four "Lord of the Rings" stars to star, pre-"Rings," with Harrison Ford. While working on the Lord of the Rings trilogy, he asked writer/director Peter Jackson to revise scripts so that his character Aragorn would be speaking in the Elvish language in several scenes of all three movies.
He became good friends with the close-knit stunt men on the "Lord of the Rings" films, but they were wary of doing fight scenes with him because, carried away with the intensity of his character Aragorn, he would frequently "really go at them" and leave the other combatants in bruises.
One day he suffered an accident which left a bruise on the right side of his face.
As a result, director Peter Jackson had to shoot only the left side of his face in the entire Moria sequence.
In 1982, he fell in love and followed his girlfriend back to New York City, hoping for a long romance and a writing career. In New York, Viggo found work waiting tables and bar tending and began taking acting classes, studying with Warren Robertson. In 1999, Viggo got a phone call about a movie he did not know anything about: The Lord of the Rings.