Greg Hart is an English guitarist who is a co-founding member of the UK power pop rock band Cats in Space.

Hart's career started off in southern England based heavy metal band Snowblind that he formed with school friends (1980).

In 1988 he helped form If Only with management team Harry Cowell and Simon Napier-Bell and recorded one album featuring ex-Girlschool vocalist Jackie Bodimead.

After signing a publishing deal with Peter McCamley, he teamed up for several songs with Michael Moran who also guested as orchestra leader on the debut album Too Many Gods[3] by Cats in Space (2015).

Reforming Moritz in 2008, the band recorded two albums Undivided[4] and SOS’[5] on Harmony Factory, before he quit to form Cats in Space.