KTL is a musical duo consisting of Stephen O'Malley (Sunn O)))) and Peter Rehberg (Pita), originally formed to create the music for a theater production titled Kindertotenlieder by Gisèle Vienne and Dennis Cooper. The production premiered in Brest, France, in March 2007.

The duo has also played shows not associated with the Kindertotenlieder production.