Best known for his role in the 1978 family movie The Magic of Lassie with James Stewart, Sharrett additionally co-starred in the 1985 action film Savage Dawn and in the 1986 Wes Craven horror film Deadly Friend, for which he received a Young Artist Award nomination as the "Best Young Actor in a Horror Motion Picture".
On February 20, 1978, Sharrett guest starred on Little House on the Prairie on the episode entitled "The Stranger" about young Peter Lundstrom, who is expelled from his private school for petty theft, so his wealthy father sends the boy to stay with Uncle Nels Oleson in Walnut Grove for a long-overdue lesson in values.
After some additional television roles and a part in the 1978 Walt Disney comedy western film Hot Lead and Cold Feet, Sharrett landed the role of Chris, the grandson of Clovis, played by Academy Award winner Jimmy Stewart in the 1978 musical film The Magic of Lassie.
[3] Lassie is taken away from Chris, who then is put under pressure when his grandpa has to decide whether to sell the valuable family vineyard in return for the dog.
Two years later, in October 1990, Sharrett served as a main character in an episode of the American television drama The Trials of Rosie O'Neill.