Returns # of years, months, and days

Please help! I need a formula that will look at two different date fields and then return a value that would result in the number of years, months, and days as a total. Example:
Column A Column B Column C
1/1/2006 2/21/2007 1 Year, 1 Month, 20 days


I need the formula for Column C... Any help would be greatly appreciated.