Fay appeared in the film Clive Hole, adapted from a short story by Alexi Sayle and starring David Schneider, Karl Theobald and Susan Vidler.

Fay has written and performed three solo comedy shows at the Edinburgh Festival Fringe, first appearing with her "Magic Steve's Disappearing Act" (featuring her magician's assistant character, Annette Cadabra) in 2006.

[3] She appeared in her second solo show, "Isabel Fay: Altar Ego", in 2007;[4] and her third, "Don't Let A Gift Horse in the House", at The Pleasance Courtyard in 2008.

[5] Along with Tom Hopgood, Fay co-owns production company Clever Pie, which makes online comedy sketches and films.

[13] Fay wrote and performed as a roving reporter on Monkey TV's online show Newslog, which also stars Steve Punt.