The pair - who said 'I do' last year in a lavish ceremony in Italy - told Confidentialthat children has always been part of their life plan.
"A family has always been part of our life plan," Anna told the publication.
Anna added: "It will probably be towards the end of this year that we start trying."
In 2013, more than 1.2 million Australians watched Tim, 36, declare his love for Anna, 32.
The pair are now based in the Sydney beach-side suburb of Bondi.