The 20 year old has been dating the Victorious star for two months, and they made their first public appearance as a couple at Britain's Wimbledon tennis tournament in London last week (ends04Jul10).
But Hoult is worried their relationship will be put under strain soon, as he is due to move Down Under to shoot the new Mad Max film with Charlize Theron.
He says, "It will be tough being away from Victoria but I hope she will come visit me. I also have family and friends coming to stay at certain points during filming so I won't get too homesick."
While Justice adds, "Ten months is a long time, but hopefully I will be able to get out and see Nicholas."