Youcca Troubetzkoy (Russian: Ю́рий Никола́евич Трубецко́й; 12 December 1905 – 22 April 1992), also credited as Youcca Troubetzkov and Nicolas Barclay, was an American actor.

[1] He was a member of the princely Trubetskoy family, son of Prince Nikolai Nikolaievich Troubetzkoy (1867–1949) and the countess Jekaterina Mikhailovna Mussin-Pushkin (1884–1972).

[2] His brother, Prince Igor Nikolayevich Troubetzkoy (1912–2008) became a race car driver.