Spock's mother, Amanda Grayson, was a human schoolteacher from Earth and his father, Sarek, was a respected diplomat. For most of his life, Spock was torn between his emotional human side and the stern discipline of his Vulcan half until his experience with the V'Ger machine-entity in 2271 and his later death and rebirth in 2286 broadened his perspective. As of 2267 he had earned the Vulcanian Scientific Legion of Honor, had been twice decorated by Starfleet Command and held an A7 computer expert classification.

As a child, Spock had a pet sehlat, which is a cuddly Vulcan bear-like animal with claws and fangs, named Ay-Chia. The sehlat however was killed in the Vulcan Forge, having been euthanised by Spock after the creature was poisoned. His older half-brother, Sybok, who was ostracized from Vulcan because he rejected the way of pure logic, was killed in 2292 after battling an alien entity at the galaxy's center that claimed to be 'God.'
 
At age seven, Spock was telepathically bonded with a young Vulcan girl named T'Pring. The telepathic touch would draw the two together when the time was right after both came of age: once every 7 years all Vulcan males experiences pon farr, a powerful Vulcan mating drive which demands that they mate or die. In 2267, however, T'Pring chose Stonn, a Vulcan, over Spock, and the Vulcan returned to the U.S.S. Enterprise unwed. He did eventually marry in a ceremony attended by Lieutenant Jean-Luc Picard.
 
Because the young Vulcan chose to join Starfleet, he and Sarek opened an 18-year rift over Sarek's hope his son would attend the Vulcan Science Academy. Spock was the first Vulcan to enlist in the Federation Starfleet, serving aboard the U.S.S. Enterprise under Captain Christopher Pike as a lieutenant, and later for James T. Kirk.
 
After the conclusion of the U.S.S. Enterprise's five-year mission, Spock retired from Starfleet and returned to Vulcan to pursue the emotion-purging of the kohlinar discipline from the Vulcan Masters.  

The son of Jewish immigrants from the U.S.S.R., Leonard Nimoy was born in Boston in 1931. His first stage appearance was in "Hansel and Gretel" at age eight. After a short stint at Boston College, he came to California in search of an acting career.
 
In 1954 he married Sandra Zober, an actress. Then Nimoy went into the Army and spent 18 months serving in Georgia, at Ft. McPhearson. He wrote, narrated and emceed GI shows for the Army's Special Services branch. During that time he directed and played "Stanley" in the Atlanta Theater Guild's production of "A Streetcar Named Desire."
 
After his discharge from the Army, Nimoy enrolled in the Pasadena Playhouse in California. He worked as a soda jerk, movie usher and cab driver to pay the bills while he studied acting. Eventually he left the playhouse, his sights on a film career, rather than theater.
 
Nimoy ran a drama studio in North Hollywood for three years and taught for a year at Synanon; by now he had two children, Adam and Julie.
 
Nimoy's film debut was in the movie, "Queen for a Day," in 1951. It was a theatrical film based on the popular television series of the early fifties. Next he did "Rhubarb," where he played one of the baseball players whose team is inherited by a cat.
 
His first starring role was in 1952 as "Kid Monk Baroni," a youth with a deformed face who becomes a winning boxer. It was then back to lesser roles for the films "Francis Goes to West Point," and "Zombies of the Stratosphere." He also had a small role in "Old Overland Trail," a B-Western by Republic Pictures.
 
In the '60s, Nimoy began to break into television. He made guest appearances on many series, including, "Rawhide", "The Virginian", "Profiles in Courage", "Dr. Kildare", and "The Outer Limits." Nimoy had a recurring role on the popular series, "Sea Hunt", starring Lloyd Bridges.
Nimoy's first meeting with Gene Roddenberry came when he guest starred in an episode of "The Lieutenant."
 
Finally came his big break in 1966 when he began his role as the Vulcan officer Spock on "Star Trek." His first promotional trip for that show was when he was Grand Marshall of Medford, Oregon's annual Pear Blossom Festival. It was the first sign that he'd finally made it. This idea was confirmed after the Pear Blossom Parade when Nimoy signed autographs for a crowd of fans so large officials had to "rescue" him from the well-meaning autograph seekers. Then, when TV Guide featured his picture and article in their March 4, 1967 issue, he was sure of it.
 
Given this new popularity, Nimoy won roles in several stage roles, "Monserrat, "Visit to a Small Planet," and "Cat on a Hot Tin Roof."

Trying another talent, in 1967 Nimoy released his first record album, based on the Star Trek character of Mr. Spock. "Leonard Nimoy Presents Mr. Spock's Music from Outer Space", the album produced a hit single, "Visit to a Sad Planet." The sales of these records were so good, he made a second album, "The Two Sides of Leonard Nimoy", with Spock's character on one side and Nimoy as himself on the other. The album contained songs and poetry set to music. Nimoy went on to release three more albums, these primarily folk music and his own renditions of popular songs. Nimoy also made five narrative albums in the 1970s, including readings from "War of the Worlds" and "The Martian Chronicles."

When "Star Trek" ended in 1969, Nimoy joined the "Mission: Impossible" team as a regular, replacing Martin Landau. He stayed with the show for two years.

In 1971, Nimoy starred in "Fiddler on the Roof," and then third billing in "Catlow," the same year. In 1973, he rejoined his "Star Trek" cast mates for "Star Trek: The Animated Series." In 1974, he did a TV movie called, "The Alpha Caper" and "The Missing are Deadly," in 1975. In 1975, Nimoy returned to college and earned a master's degree in education at Antioch College.
 
In 1977 Nimoy played Martin Dysart in the play "Equus," on the New York stage. In 1978, he starred in a remake of "Invasion of the Body Snatchers," where he played a psychiatrist who had an unusual way of making his patients face their deepest fears. Then he went on from 1978-1981 to tour the country in his one-man play, "Vincent." The play was written and directed by Nimoy, based on the play "Van Gogh" by Phillip Stephens. After more than 150 performances, "Vincent" was finally videotaped and broadcast on the A&E cable network.
 
In 1978, work began on the first "Star Trek" feature film. With some reluctance, Nimoy returned as Spock. The film was released on December 7, 1979. Nimoy went on to co-star in the next five "Star Trek" films, as well as a two-part episode of Star Trek: The Next Generation, entitled, "Unification."
Nimoy's first experiences with directing a feature film came with "Star Trek III: The Search for Spock" and "Star Trek IV: The Voyage Home." That was only the beginning. Since then, he has gone on to direct "Three Men and a Baby," in 1987, "The Good Mother," in 1988, and "Funny About Love."

The television mini-series "A Woman Called Golda," and "Marco Polo" were good parts for Nimoy and helped show that he could do more than be Mr. Spock.

In 1986, Nimoy separated from his wife of 32 years and eventually obtained a divorce. Nimoy has since remarried.

One of his hobbies is black and white photography. Utilizing this talent, Nimoy published several volumes of poetry, illustrated with his photos. The first of these books was called, "Why Not You and I?"

In 1991, Nimoy starred in and produced the film, "Never Forget," for the Turner Network, which deals with a true case of a Holocaust survivor suing a neo-Nazi organization who claimed the extermination of Jews in World War II was a myth.

Biographies derived and edited from the Official Site.