- 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
- Kostraki Maria, Soloist, Soprano
- Kotenidis Nikos, Soloist, Baritone
- Koti Maria, Singer
- Kotidou Dimitra, Soloist, Soprano
- Kotomatas Leonidas, Soloist, Tenor
- Kotsali Anastasia
- Kotsali Hara, Choreographer
- Kotsikoyannis Vassilis, GNO Chorus Member, Tenor
- Kotsopoulos Thanos, Actor, Director, Playwright
- Kotsoudaki Afroditi, Set and costume designer
- Kotzailia Calliope, Soloist, Soprano
- Koukos Periklis, Composer
- Koukoutaras Yannis, Soloist, Baritone
- Koulloumbi Vassiliki, GNO Chorus Member, Soprano
- Kouloumbi Christina, Set and Costume Designer
- Kouloumbis Andreas, Soloist, Baritone
- Kouloumbis Victoras
- Koumantareas Menis, Literary Writer
- Koumendakis Giorgos
- Kounadis Argyris, Composer
- Kountouris Ioannis, GNO Chorus Member, Baritone
- Kountouris Vassilis, GNO Chorus Member, Baritone
- Kouphochristou Nina, Soloist, Soprano
- Kourachani Mitsa-(Mitsi), Soloist, Soprano
- Kourakou Mary, Soloist, Soprano
- Kourkoulou Vanessa, Dancer
- Kouroupakis Petros, Dancer
- Kouroupos Giorgios, Composer
- Kourousopoulos Loudovikos, Soloist, Tenor
- Kourpas Panagiotis, Lighting Designer
- Kousakis Yorgos, Member of GNO Children's Chorus
- Kousi Emilia, GNO Chorus Member, Mezzo-soprano
- Kousouni Maria, Dancer
- Koutelieris Zafiris, Soloist, Baritone
- Koutsoumbi Eleni
- Kovač Vera, Soloist, Soprano
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