NASHVILLE, TN  [Friday Apr.14.2006]  /Mix103FM.com/ -- If Keith Urban and Nicole Kidman get hitched and she asks for a pre-nup, it won't be because Urban is a gold digger.

Seems they're both doing well in the money-making department.

According to Australia's Herald Sun, the pair is riding high on the list of Australia's 50 richest entertainers for 2005.

Kidman, one of Hollywood's highest-paid actors, came in at No. 3 on the BRW list of top 50 Australian entertainers, with gross earnings of $22.3 million.

Urban, whose earnings jumped from $4.7 million in 2004 to $20 million last year, charged to No. 5 on the rich list.

By they way, the wealthiest Australian act is the children's group "The Wiggles." They raked in a whopping $50 million thanks to sold-out shows across Britain and the US.

Here are the top 5 highest-earning Australian entertainers:

1. The Wiggles $50m
2. AC/DC $25m
3. Nicole Kidman $22.3m
4. Hugh Jackman $20m
5. Keith Urban $20m

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