American actor (1931–2017) who played two pointed-eared rivals in The Original Series: the Romulan officer Decius in Balance of Terror and the Vulcan Stonn in Amok Time.
Lawrence Montaigne was an American actor, dancer and stunt performer, born in 1931, whose film work included the prisoner Haynes in The Great Escape (1963).
He first appeared in Star Trek in the first-season episode Balance of Terror as Decius, the ambitious young Romulan officer whose unauthorised transmission helps the Enterprise track the Bird-of-Prey. He returned in the second-season opener Amok Time as Stonn, the Vulcan whom T'Pring prefers to Spock and for whose sake she invokes the challenge.
Montaigne remained a regular guest at conventions for decades. He died in 2017.