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For the article about James T. Kirk's brother, please see George Samuel Kirk.
For the alternate reality counterpart, please see George Kirk (alternate reality).
"You often spoke of him as being your inspiration for joining Starfleet. He proudly lived to see you become captain of the Enterprise."

Lieutenant George Samuel Kirk, Sr. was a Human Starfleet officer in the early 23rd century. He was the son of Tiberius Kirk, husband to Winona Kirk, and father of Starfleet officers James T. Kirk and George Samuel Kirk. (TOS: "Where No Man Has Gone Before", "Operation -- Annihilate!"; Star Trek)

He and Winona had four grandchildren: three from their son George Jr., and one from their son James. (TOS: "What Are Little Girls Made Of?"; Star Trek II: The Wrath of Khan) A fifth grandchild, also James's, died in utero. (TOS: "The Paradise Syndrome")

Early life[]

When George Kirk was a kid, he owned a PX70 motorcycle. According to an alternate version of his son James, Kirk often put Winona on the back of the vehicle and it drove her nuts. (Star Trek Beyond)

Sometime later, Kirk and Winona married and had two children, George Samuel and James. (TOS: "Where No Man Has Gone Before", "Operation -- Annihilate!"; Star Trek)

Starfleet career[]

Kirk joined Starfleet because he truly believed in the humanitarian and exploratory ideals of the Federation. By 2233, at the age of twenty-nine, Kirk was serving as first officer aboard the USS Kelvin under Captain Richard Robau. His wife was also aboard the ship and was pregnant with his son James Kirk at the time. (Star Trek; Star Trek Beyond)

George Kirk raised his son James in Iowa, before moving to the Tarsus IV colony sometime before 2246. (SNW: "A Quality of Mercy"; TOS: "The Conscience of the King")

At some point between 2229 and 2233, he became the youngest Starfleet officer to achieve the position of first officer, a record that was broken in 2259 by his younger son, James at the age of 26. (SNW: "Lost in Translation")



During his time with Starfleet, he barely had time to see his family.

James T. Kirk[]

When James was young, he would often wonder why his Dad would choose to help total strangers rather than make the effort to be with his sons; the young James came to believe it was something important. (SNW: "Lost in Translation") This provided him with the inspiration to join Starfleet. George lived at least long enough to see his son become captain of the USS Enterprise in 2265. (Star Trek; VOY: "Q2")

George Samuel Kirk[]

While he was the elder son and had been named after George (though he did not use the name), Sam felt his father held "old-fashioned" views on what made a fulfilled life and successful career, which were reflected more by James, who followed in his father's footsteps as a command officer in Starfleet than Sam, who became a scientist. (SNW: "Lost in Translation")

Alternate timeline and realities[]

In an alternate 2266, created after Christopher Pike prevented the death of several Starfleet cadets and his own exposure to delta radiation, James Kirk mentioned his father to Pike, who in this timeline was still captain of the Enterprise. (SNW: "A Quality of Mercy")


Background information[]

George Kirk, specifically the alternate reality version of the character, was played by Chris Hemsworth. This footage of George Kirk was set immediately after the split in the timeline, allowing an insight into what the prime-universe version of the character was like, as George Kirk has never appeared in canon aside from that.

Although George Kirk wasn't canonically referred to until the series of alternate reality films (released from 2009 onwards), there were several early attempts to refer to him. For instance, in the first draft story outline for TOS: "The Conscience of the King" (dated 13 April 1966), James Kirk's father was depicted as having led a research expedition on a planet colony, twenty-five years prior to the events of that story, at which time Dr. Leighton had been his assistant. After the colony was brutally taken over by an army of marauders (which was led by a revolutionary leader named Kodos), they tried to force Kirk's father to defect to their side. He refused, rejecting a medallion that bore the symbol of the marauders, who consequently executed him, while his son, James Kirk, was watching.

At this early stage in the development of "The Conscience of the King", the murder of Kirk's father was key to the episode's backstory, though he wasn't actually named in the story outline. The decision to drop the idea of his murder was made by the series' writing staff, rather than by the writer of the episode, Barry Trivers (as evidenced by a memo dated 15 April 1966). The change was made because the TOS writing staff believed that having the victim be James Kirk's father would tie them "to an aspect of Kirk's close family past, creating something which may hem us in later."

George Kirk was also mentioned in the unfilmed Star Trek: The First Adventure script as having died when his craft, the Bonaventure, disappeared during an experimental dilithium-fueled warp jump. Montgomery Scott worked with him on the project.

In the script of Star Trek, George Kirk was referred to as a thirty-two-year-old as of 2233, suggesting he was born in 2201. The script also described him as having an "all-American face." [1] On the other hand, in Star Trek Beyond, James Kirk muses that, upon reaching thirty, he'll be a year older than his father when he died, making George twenty-nine at the beginning of 2233, with a corresponding birth year of 2203 or 2204.

As director of the film Star Trek, J.J. Abrams specifically asked for Chris Hemsworth to portray George Kirk, though the actor had only begun working in America a few months beforehand. He received notification of the role one day after he returned to Los Angeles following a couple of months of filming in Chicago. "I had a phone call from my manager saying that I needed to drive across right away to Paramount Studios and meet J.J. Abrams in his office to do the scene," Hemsworth explained. "I cancelled what I was doing, drove over there, did the scene in his office at his desk and he said, 'Fantastic – we have to work together. You start next week.' And that was it!" Although Abrams didn't share much information with the performer at that time, Hemsworth did use a genuine scene from the movie for his audition. He had very little time to prepare for the role, though there wasn't a lot he could do to ready himself for the part anyway. (Star Trek Magazine issue 145, p. 91)

Since this character had never appeared before, Abrams and Hemsworth were free to collaborate on the portrayal of George Kirk. "On set we discussed how we wanted to play it," remembered Hemsworth. "J.J. had very specific ideas about what we wanted to achieve, but he's also the kind of director that gives you the freedom to try other things and put your own interpretation on it. It was more a case of taking the scenes that we had, and finding the truth in what was being said, then just playing that and trusting in the overall picture J.J. was creating and that the writers had done for us." (Star Trek Magazine issue 145, p. 91)

Constructing a backstory for his own character, Hemsworth came to the opinion that George Kirk is "someone who has quite a strong sense of justice. He's that old-fashioned kind of good guy: he has strong morals and puts other people before himself. But he was also played as someone in his mid-20s. He's still quite young, so I think a lot of who he is was ingrained, maybe through his upbringing. I feel like he had a pretty strong sense of character, and especially to be put in the position he is at such a young age says a lot about who he is." (Star Trek Magazine issue 145, pp. 91-92)

In many ways, Chris Hemsworth was relieved that, because there wasn't much rehearsal time, he didn't have long to consider what he was letting himself in for by playing James Kirk's father. "That was funny," he remarked. "In a really good way, I was thankful for not having enough time to think about it, because the turnaround from the audition to when I was shooting was so quick. I didn't have too much time to think about the pressure that was built around it. But afterward, the more I heard about it, I started hoping I did an okay job! [....] There were a couple of times when I was sitting there on set, and I thought that it doesn't get any bigger than this, in terms of money, expertise and everything that's put into making a film. And I wondered what I was doing there! But [...] it was mind-blowing and exciting." Also, Hemsworth found that his confidence regarding his performance was boosted by Abrams. (Star Trek Magazine issue 145, p. 92)

He may have a brother, since James T. Kirk said he was staying at his uncle's farm in Idaho in Star Trek Generations. It was never made clear which of his parents had a sibling though, or if he was just using the term for a long time family friend. In Star Trek, an uncle Frank was cut from the script and reworked into Winona's new husband heard in the film.


Final Frontier cover

The cover of Final Frontier, including an illustration of George Kirk

The name "George" for James Kirk's father first originated in Vonda N. McIntyre's TOS novel Enterprise: The First Adventure, which gives his full name as "George Samuel Kirk, Senior". The novel Collision Course calls him "George Joseph Kirk", while the comic book story "Captain James T. Kirk: Psycho-File" calls him "Benjamin Kirk". Star Trek II: Biographies calls him "Eugene Claudius Kirk".

Intel's Star Trek tie-in website gave his serial number as SA-733-9624-AM.

George Kirk was seen as the first officer of the USS Enterprise under Captain Robert April in the novel Final Frontier. In the novel, Kirk was the one responsible for convincing Captain April (who had been charged with naming the as-yet-unnamed ship) to name the ship Enterprise. The cover art for the book contained a picture of him.

Additionally, Kirk played a major role in the novel Best Destiny, where he was once again shown as first officer under Captain Robert April. He plays a more direct role in sixteen-year-old James Kirk's life, and is upset with him for his rebellious behavior.

In the Crucible trilogy, written by David R. George III, George Kirk was described as having died when his son, James, was a young boy, with no mention of the elder Kirk's career in Starfleet.

IDW Publishing's comic Keenser's Story depicts George Kirk as having been present for first contact with the Roylans (β) (Keenser's species). After Keenser helps them fix their shuttle, he accompanies George on the ride back to the Kelvin, with the intention of going to Starfleet Academy.

Issue 17 of the Star Trek: Boldly Go series depicts a George Kirk who never served on the Kelvin. He is shown in command of the USS Enterprise with Sulu as his helmsman, while attacking a squad of warbirds. The followup issue showed George inviting James out on a a ride on his motorcycle.

The novel The Autobiography of James T. Kirk lists George's birthday as December 13, 2206. According to this novel, his mother was named Brunhilde Ann Milano and was a nurse on Starbase 8. George served aboard the USS Los Angeles before being promoted to first officer of the USS Kelvin.

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