But the pair reportedly ended their relationship in 2011, with Ward involved with Labour MP David Parker.
Fairfax reported Alexander saying in her magazine article: "People asked questions, like, 'why get married at all?' Well, Chris wanted me as a his primary caregiver and I'd decided in the years before we grew so close that I wanted to find out what commitment truly meant."
Knox's recording career stretches back to late 70s punk era bands The Enemy and Toy Love, as well as a long association with independent music label Flying Nun as a solo artist and a member of duo the Tall Dwarfs.