The grandson of screen legend Gregory Peck has been cast as the new Mr Spock in the Star Trek television franchise.
Peck will play Spock in the second season of Star Trek: Discovery.
The character, a half-human alien from the planet Vulcan with pointed ears, arched eyebrows and green blood, was originated by actor Leonard Nimoy on the original Star Trek series which aired between 1966 and 1969.
In the wake of Star Trek's evolution into a billion-dollar franchise for the US studios CBS and Paramount, the character, along with his USS Enterprise colleagues Captain Kirk, Scotty and others, have become pop culture icons.
Though at times he wrestled with the popularity of the character, Nimoy reprised the role of Spock in an animated television series and a series of films between 1979 and 1991 and also appeared in Star Trek: The Next Generation.
He also notably wrote two books, I Am Not Spock and, decades later, its sequel, I Am Spock.
Nimoy last appeared as the character in two cameo appearances in J.J. Abrams' reboot of Star Trek and its sequel Star Trek Into Darkness in 2009 and 2013. Nimoy died in 2015.
Star Trek executive producer Alex Kurtzman confirmed today 32-year-old Peck would take on the role.
"Through 52 years of television and film, a parallel universe and a mirror universe, Mr Spock remains the only member of the original bridge crew to span every era of Star Trek," Kurtzman said.
Kurtzman paid tribute to "the great Leonard Nimoy, then the brilliant Zachary Quinto, [who] brought incomparable humanity to a character forever torn between logic and emotion."
Quinto plays Spock in the newer Star Trek film series produced by Abrams.
The search for an actor to play Spock lasted for months and Kurtzman said the production was looking for an actor who could "effortlessly embody Spock's greatest qualities, beyond obvious logic: empathy, intuition, compassion, confusion, and yearning."
"Ethan Peck walked into the room inhabiting all of these qualities, aware of his daunting responsibility to Leonard, Zack, and the fans, and ready to confront the challenge in the service of protecting and expanding on Spock's legacy," Kurtzman said.
"In that spirit, we're thrilled to welcome him to the family," he added.
Peck's credits include roles on television series such as Gossip Girl, Madame Secretary and 10 Things I Hate About You.
But he is perhaps more famous for his lineage: he is the grandson of legendary actor Gregory Peck, whose credits include To Kill a Mockingbird, Twelve O'Clock High, Roman Holiday, The Guns of Navarone, The Omen and The Boys from Brazil.
In a notable endorsement, Ethan Peck met with members of actor Leonard Nimoy's family, who gave him their blessing in taking on the role.
Peck thanked the Nimoy family for their "open arms, warm welcome, smiling curiosity and support [and] for making me feel worthy as I embrace and take into my heart the iconic half-alien we know as Mr Spock."
"It is an incomparable honour," Peck said.
The character of Mr Spock was introduced in the Star Trek pilot The Cage, which was filmed in 1965, and featured an earlier version of the Enterprise, commanded by Christopher Pike.
It is that version of Spock which Peck will bring to life in Discovery, which is set in the "pre-Original Series" era of the show.
The character of Spock has already been established in Discovery as the adopted brother of the show's lead character, Michael Burnham (Sonequa Martin-Green), a human woman who was raised on Vulcan by Spock's parents.
Spock will be introduced as the show folds into the Star Trek "canon" by introducing other key characters from that era, including Captain Pike (Anson Mount) and his first officer, Number One (Rebecca Romijn).
As some of the character's key characteristics - notably, his adherence to emotionless logic - were not bedded down until after the 1965 pilot was filmed, it is understood the producers of Star Trek: Discovery will give the character's emotions some latitude.
Playing Spock in The Cage, for example, actor Leonard Nimoy smiled in several scenes; there are rumours Discovery will write Spock as still young enough to have not resolved the confict between his human and Vulcan parentage.
An episode of the franchise's animated series, which explored Spock's childhood, touched on his struggle to fit in on Vulcan, where he was perceived as an outsider; his father was the prominent diplomat Sarek but his mother was a human alien, Amanda Grayson.
The second series of Star Trek: Discovery will air in early 2019; the series airs in the US on the streaming platform CBS All Access and in Australia on Netflix.