[1] She has also appeared as Bunty Morrell in "A Perfect Hero",[2] as Clare Shearer in Peak Practice, as Philippa Kinross in Casualty, and in The Jury.

Gillies has had many guest roles, including appearances in Cadfael, Powers, A Bit of Fry & Laurie, Holby City, PhoneShop, Waking the Dead and Coronation Street.

[9] Gillies also produced The Beat Beneath My Feet, about a has-been rock star, played by Luke Perry, who is discovered living in a flat in South London.

[10][9] Gillies produced Some Sweet Oblivious Antidote, a short film starring Lenny Henry, Colin Salmon, Wunmi Mosaku and Sylvestra Le Touzel.

[11][12] In 2020 Fiona Gillies co-founded SMASH the Rights and IP Marketplace, with fellow producer Christine Hartland and digital pioneer Mahesh Ramachandra to encourage new, diverse talent to engage with decision makers.