Michael Douglas and Catherine Zeta-Jones are planning to return to Bermuda to renew their wedding vows, US newspapers have reported.The pair, who once lived here with their two children, hope the move will help put recent troubles behind them.Mr Douglas, 68, battled throat cancer in 2010 while his Welsh wife went into rehab in 2011 to deal with bipolar II disorder.Reported the Daily Star: “They want to put a few difficult years behind them. It will be a private affair in Bermuda.”The couple married in a lavish ceremony in New York on November 18, 2000.