Court records in Los Angeles show a judge signed off on the couple's breakup Wednesday.
The Heart singer-guitarist and Academy Award-winning writer-director resolved their split without fanfare, using a retired judge as a mediator to end their 24-year marriage.
Wilson filed for divorce in September. The couple have twin 10-year-old sons.
Crowe, director of films such as "Jerry Maguire" and "Say Anything," won an Oscar for the screenplay for "Almost Famous." Wilson worked on the soundtracks of several of Crowe's film, and had a cameo in "Fast Times at Ridgemont High," which he wrote.
The couple have been separated since June 2008.