The 50-year-old actress beat out actor Kyle Massey and voting favorite Bristol Palin to take the title Tuesday.
Grey and professional partner Derek Hough earned a string of perfect scores on their way to the mirror-ball trophy.
The couple consistently topped the judges' leaderboard throughout the season, but Palin's cadre of voter support led to some surprising upsets, including Brandy's elimination after earning a perfect score last week.
Read more