Katherine’s family lineage also have ties to the entertainment spectrum; her mother Elizabeth was trained as an actress at the Royal Academy for dramatic art, her grandmother Joy was a violinist and pianist, and her great grandmother Elizabeth Haslam was a opera singer who won a competition at the Royal Albert Hall in 1893.
From 1997 to 2000, Ellis was the vocalist for Ruff Driverz, singing "Deeper Love," "Don't Stop," "Shame," and the international hit "Dreaming" (for which she also wrote the Spanish topline for under the credited alias name of 'Arrola').
[1] In 2008, Ellis' releases included "When You Touch Me" with Freemasons (Loaded), "Ain't Nothin' Goin' On But The Rent" with 7th Heaven (Hard2Beat), "Poza (Got What I Need)" with Countparis (Eyezcream), "Do It" with DJ Prom (GFab), "Gotta Get Through" with Paul Emanuel & Gav McCall (Born to Dance), and "One Luv" with Soul Avengerz (Milk & Sugar/One Love Recordings); as well as "Laisser Toucher" with Cerrone which is featured in the French film, Disco!.
In 2009, her releases include the re-release of "Dreaming", "You're Mine" with Solitaire (Muzik K) and "Time 2 Play" with Soulshaker (Audiofreaks) as well as an acoustic version of "Hideaway" featured on New State Music's UnClubbed Album.
She also wrote and performed two tracks, "Control" and "You Make Me Crazy" that featured on Lee Coombs' 2009 album, Light & Dark.