From high school to the captain's chair at Starfleet Academy, and beyond, visit the many roles of William Shatner on and off the screen. </br></br>Canadian-born actor William Shatner poses for a portrait at The Langham Huntington Pasadena, April 2, 2015, in Pasadena, California.

William Shatner is seen in his senior year class photo from West Hill High School in Montreal, Quebec, Canada, circa 1948.

William Shatner consults a script while filming an episode of the television anthology series "The Alfred Hitchcock Hour," April 11, 1957.

William Shatner, as Don Carter, and Patricia Breslin, as Pat Carter, in episode, "Nick of Time," from the science-fiction television series, "The Twilight Zone," Aug.17, 1960.

William Shatner, left, as Captain James T. Kirk, Leonard Nimoy, as Mr. Spock, and DeForest Kelley, as Dr. McCoy, in a scene from the episode "The City on the Edge of Forever" of the television series, "Star Trek," April 6, 1967. <br><br>Shatner portrayed the Starfleet captain in all three seasons of the show, as well as in movies that followed.

William Shatner, as Captain Brandywine Gage, in a scene from the episode "A Small Beheading" of the television series "Kung Fu," 1974.

William Shatner poses for a portrait, circa 1975.

William Shatner, as Sgt. T.J. Hooker, in a scene from the episode "God Bless the Child" from the television series "T.J. Hooker." <br><br>The crime drama last five seasons with Shatner taking on the role of director for 10 episodes during the final season.

William Shatner and wife Marcy Lafferty Shatner pose for a photograph at Night of 100 Stars, March 8, 1982, in New York City.

William Shatner stands with his daughters, Melanie, left, and Lisabeth, at the Ringling Bros. and Barnum & Bailey Circus July 31, 1990, in Los Angeles, California. <br><br> Shatner had Melanie and Lisabeth, along with their sister Leslie, with his first wife, Gloria Rand, whom he divorced in 1969.

William Shatner, as Captain James T. Kirk, and DeForest Kelley, as Dr. Leonard "Bones" McCoy, in a scene from "Star Trek VI: The Undiscovered Country." <br><br>Shatner played Captain Kirk in six films.

Nerine Kidd and William Shatner attend the "Star Trek: 30 Years and Beyond - A Live Tribute" at Paramount Studios in Los Angeles, Oct. 6, 1996. <br><br>Shatner and Kidd married in 1997 and stayed together until her accidental drowning death in 1999.

William Shatner, left, as Denny Crane; James Spader, as Alan Shore; and Rhona Mitra, as Tara Wilson, in a scene from the episode "Comings and Goings" of the legal drama, "The Practice." <br><br>Shatner would go on to guest star in only five episodes of the series but win an Emmy award for outstanding guest appearance in a television drama and play the same character in a spinoff show of his own.

Actor William Shatner poses with the Emmy for best supporting actor in a drama series for the ABC show "Boston Legal" in the press room at the 57th Annual Emmy Awards at the Shrine Auditorium, Sept. 18, 2005, in Los Angeles. <br><br>"Boston Legal" earned Shatner his second Emmy award win as well as four more nominations throughout the show's airing.

William Shatner arrives on horseback during Comedy Central's Roast of William Shatner in Studio City, California, Aug. 13, 2006.

William Shatner competes during the reining competition at the Del Mar Equestrian Center in Los Angeles, California, April 23, 2006. <br><br>Shatner is an avid horse lover who breeds Quarter Horses and American Saddlebreds on his 360-acre ranch in Kentucky on his spare time.

William Shatner, left, as Denny Crane; Rene Auberjonois, as Paul Lewiston; and Rhona Mitra, as Tara Wilson, in a scene from the episode "Catch and Release" of the legal drama "Boston Legal." <br><br>Shatner's character, Denny Crane, whom he first portrayed in "The Practice" for five episodes, was made into the main character of "Boston Legal."

William Shatner and wife Elizabeth Shatner depart the Oscars at Hollywood & Highland Center, Feb. 24, 2013, in Hollywood, California. <br><br>Shatner married Elizabeth Martin in 2001. They have no children together but are still married.

William Shatner signs copies of his new book, "Leonard: My Fifty-Year Friendship with a Remarkable Man," at Barnes & Noble at The Grove, Feb. 18, 2016, in Los Angeles, California.

William Shatner, 90, speaks to the media upon arrival back to earth, following a space flight aboard Blue Origin's New Shepard rocket, from the launch pad in Van Horn, Texas, Oct. 13, 2021. Shatner became the oldest person in space.