John Herbert Frid (December 2, 1924 – April 14, 2012), known as Jonathan Frid, was a Canadian actor, best known for his role as vampire Barnabas Collins on the gothic television soap opera Dark Shadows. The introduction in 1967 of Frid's reluctant, guilt-ridden vampire caused the floundering daytime drama to soar to 20 million daily viewers. His watershed portrayal has been cited as a key influence on contemporary genre film and television series such as Twilight, True Blood and The Vampire Diaries.

Jonathan Frid was born of Scottish and English ancestry in Hamilton, Ontario, Canada. His birth name was John Herbert Frid. He was the youngest son of Isabel Flora (née McGregor) and Herbert Percival "H.P." Frid, a construction executive.

As a boy Frid had a natural shyness and struggled academically due to dyslexia, which was not properly understood at that time. His passion for acting began at the age of 16 when he appeared in a production of Richard Brinsley Sheridan's The Rivals at Hillfield School. The following year he joined the local community theatre, The Players' Guild of Hamilton. The theatre's leading director, American actress Gladys Gillan recognized and encouraged the young Frid's talent.

Frid's first years of study at McMaster University in Hamilton were interrupted when in 1944 he enlisted in the Royal Canadian Navy during World War II, and served on the destroyer HMCS Algonquin (R17). When the war ended, he returned to McMaster to complete his bachelor's degree. During the second half of his tenure he was President of the Drama Club, received accolades for his performances in The Royal Family and The Barretts of Wimpole Street, and graduated in 1948 with the university's Honor Society Award for Drama.

In 1949 Frid was accepted at the prestigious Royal Academy of Dramatic Art in London. After two terms, Frid left and became a leading actor in repertory in Cornwall and Kent for two seasons and toured the country in the West End thriller, The Third Visitor. Returning to Canada he ventured to Toronto where he became a featured player for three consecutive seasons in the Toronto Shakespeare Festival, produced and directed by Earle Grey. He studied voice at the Lorne Greene Academy of Radio Arts, and in 1952 appeared in Crime of Passion at the Jupiter Theatre founded by Lorne Greene. He applied his training to radio spots and a few appearances on television for the Canadian Broadcasting Corporation, including an unusual role as a native in 20,000 Leagues Under the Sea.

In the Fall of 1954 Frid became a graduate student at the Yale School of Drama in New Haven, Connecticut. He would earn his Master of Fine Arts (MFA) in Directing, however as one of the most experienced actors in the school, Frid was continually in demand for acting roles in mainstage and student productions including Julius Caesar in Caesar and Cleopatra, and starring in the premiere of William Snyder's play A True and Special Friend.

In the summer of 1955 fresh from completing the first year of his Master's program, Frid was chosen by Director Nikos Psacharopoulos to play a pivotal role in the inaugural season of the Williamstown Theatre Festival in Williamstown, Massachusetts. Frid performed leading roles in six of the ten productions including The Crucible, Time of the Cuckoo, Light up the Sky, and The Rainmaker opposite leading lady Cynthia Harris.

After receiving high praise in his second year at Yale for his portrayal of Tullus Aufidius in William Shakespeare's Coriolanus, Frid was invited to join the American Shakespeare Festival in Stratford, Connecticut. For two consecutive summer seasons, under the direction of John Houseman, Frid performed with such distinguished actors as Alfred Drake, Earle Hyman, Fritz Weaver, Sada Thompson, and Katharine Hepburn.