Keith Kenniff is an American composer, multi-instrumentalist, and electronic music producer. He composes ambient/electronic music under the moniker Helios and post-classical piano music under Goldmund. He is also one-half of the indie band Mint Julep, and ambient project "Hollie & Keith Kenniff". Keith is also a composer for film, television, dance and performance art. In 2010 he began the record label Unseen. He may be best known for composing the song "Years" for the Facebook app "Lookback."