Grégoire Aslan (born Krikor Kaloust Aslanian (Armenian: Գրիգոր Գալուստ Ասլանեան, romanized: Krigor Kalowst Aslanean); 28 March 1908 – 8 January 1982) was a Swiss-Armenian actor and musician.

He made his professional début at 18 as a vocalist, trumpeter and drummer[3] with the Paris dance band of Ray Ventura et ses Collegiens, then launched an acting career under the name of Coco Aslan.

[6] During World War II he toured South America with actor Louis Jouvet and eventually started his own theatre troupe.

[7] He became an indispensable feature in many British and American films, usually playing foreigners – Russians, Frenchmen, Italians, Germans, Albanians and Middle Easterners – with equal finesse.

In 1961, in The Devil at 4 O'Clock, alongside Frank Sinatra and Spencer Tracy, he portrayed Marcel, a criminal who finds repentance by giving his life to save children from being killed by a volcanic eruption on a South Sea island.