The former Westlife star - who proposed to the former 'Neighbours' actress three years ago, a year after he divorced Kerry Katona - is ready to walk down the aisle but has revealed the couple are struggling to find a suitable date which doesn't clash with the summer tournament taking place in South Africa.
Sports mad Brian, 29, said: "We're trying to work out a date between the World Cup and the end of the Formula 1 season. It's messing all my plans up... I was going to produce another album but I won't get any work done with both events going on."
Delta - who was recently spotted meeting Britain's Prince William during his tour of Sydney - is fortunately a "huge sports fan" so has been understanding to Brian's wishes.
The Australian actress-turned-singer - who was first rumoured to marry Brian in December 2009 - said: "I would love to go to the World Cup."