Kellin Quinn

Kellin Quinn
Quinn in March 2010
Background information
Birth nameKellin Quinn Bostwick
Also known asHaunted Mouths
Born (1986-04-24) April 24, 1986
Medford, Oregon, U.S.
Genres
Occupations
  • Singer
  • songwriter
  • musician
Instruments
  • Vocals
  • keyboards
Member ofSleeping with Sirens
Formerly ofFor All We Know

Kellin Quinn Bostwick (born April 24, 1986) is an American singer and musician. He is the lead vocalist and keyboardist of the post-hardcore band Sleeping with Sirens. He is known for his distinctive, high-pitched vocals and for collaborating with other artists, as well as the SEGA Sound Team on the game Sonic Frontiers (2022). Some of his best known collaborations are on the tracks "King for a Day" with Pierce the Veil, and "Love Race" with Machine Gun Kelly. In 2025, Quinn released A Collection of Greetings, his debut studio album under the solo project Haunted Mouths.