Morrison said he hoped to write a screenplay and also look for work.
The couple's wedding plans were mostly set, with rumours they will tie the knot at exclusive Puketutu Island on the Manukau Harbour.
A confidentiality deal has been signed with a women's magazine, but Morrison confirmed they would marry this summer. "We're looking forward to it."
Castle-Hughes' next feature film, Amos' Wake, is in post-production this week, and Morrison said producers hoped to screen it at the Cannes Film Festival in May.
Another Castle-Hughes project, a two-hour action-thriller pilot Rewind, is also in post-production.
And Castle-Hughes features in the new series of Almighty Johnsons which is believed to have begun shooting this week.