Although prenuptial agreements are common in the United States, in Britain they remain rare for most couples. However, some British divorce lawyers say it would probably be a good idea for William to have one.
"It's an absolute statistical no-brainer that a prenuptial agreement would be highly beneficial in this case," said divorce lawyer James Stewart, which handled the multimillion divorce case between Madonna and director Guy Ritchie.
In the ugly and very public split of the prince's own parents, Prince Charles' former financial adviser told Britain's Sunday Telegraph newspaper in 2004 that Princess Diana "took him to the cleaners," and claimed that Charles handed over his entire personal fortune - widely reported to be more than $27 million today - when their marriage ended after 15 years in 1996.
William stands to gain an inheritance from the queen, whose fortune was recently estimated at around $467 million by the Sunday Times 2010 "Rich List." The second-in-line to the British throne also got a share of Diana's nearly $34 million estate.
William's office is declining to comment on whether the future king will sign a premarital contract. The prince is set to wed Middleton on April 29.
The Associated Press contributed to this story