James George Thirlwell, styled as JG Thirlwell and also known as Clint Ruin, Frank Want, and Foetus, among other pseudonyms, is an Australian musician, composer, and record producer known for his use of a variety of different musical styles.

Foetus is a solo musical project of Australian musician JG Thirlwell. The project has had many similar names, each including the word 'Foetus'.note The "members" of the project are aliases of Thirlwell; they include Frank Want, Phillip Toss, and Clint Ruin. Thirlwell occasionally collaborates with other artists, but does not consider them to be members of Foetus.