- Kolisoglou Andreas, Actor
- Kolosova Alisa, Soloist, Mezzo-Soprano
- Kolydas Sotiris, GNO Chorus Member, Baritone
- Kolyva Marina, Soloist
- Komisopoulou Maria, Mezzo-Soprano
- Komisopoulou Maria, Soloist, Mezzo-Soprano
- Koniordou Lydia, Actress, Director
- Konomi Maria
- Konstandinou Ileana, Soloist, Soprano
- Konstanta Maria, Actress
- Konstantaras Kostis, Soloist, Tenor
- Konstantinidou Filitsa, Soloist, Mezzo-Soprano
- Konstantinidou M., Soloist, Soprano
- Konstantinou Argyro, Dancer
- Konstantinou Yannos, Soloist, Tenor
- Konstantinov Julian, Soloist, Bass
- Kontellis Ioannis, Soloist, Bass-baritone
- Kontes Yannis, Lighting Designer
- Kontogeorgi Nandia, Actress, TV Hostess
- Kontora Danae, Soloist, Soprano
- Kontou M., Soloist, Soprano
- Kontouri Nikaiti, Director
- Kopanou A., GNO Chorus Member, Soprano
- Korngold Erich Wolfgang, Composer
- Koromantzou Maria, Soloist, Soprano
- Koroneos Antonis, Soloist, Tenor
- Koroniadou Lena, Dancer
- Koronis Michalis, Soloist, Tenor
- Korošec Ladko (Ladislav), Soloist, Bass
- Korovesi Chrysoula, Video Designer
- Koruti Anton, Dancer
- Kos Lana, Soloist, Soprano
- Kosky Barrie, Director
- Kosmidis Kyriakos, Dancer, Choreographer
- Kosmopoulos P., Soloist, Tenor
- Kosti S., Soloist, Soprano
- Kostios Apostolos, Musicologist, Professor
- Kostopoulos Vassilis-Denachis, Soloist, Bass
- Kostopoulou Fotini, Soloist, Soprano
- Kostraki Maria, Soloist, Soprano
- Kotenidis Nikos, Soloist, Baritone
- Koti Maria, Singer
- Kotidou Dimitra, Soloist, Soprano
- Kotomatas Leonidas, Soloist, Tenor
- Kotsali Anastasia
- Kotsali Hara, Choreographer
- Kotseli Nefeli, Soloist, Mezzo-soprano
- Kotsikoyannis Vassilis, GNO Chorus Member, Tenor
- Kotsopoulos Thanos, Actor, Director, Playwright
- Kotsoudaki Afroditi, Set and costume designer
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