The couple were on a trip together in Hollywood when Cavill proposed.
Whitaker thought they were there to celebrate Cavill's birthday, who turns 28.
Cavill is currently training for the new Man Of Steel movie and Whitaker is training, as well, for the 2012 London Olympic Games as a show jumper (horses).
Cavill also has Immortals debuting November 11th with the second trailer just released (below). You can see it on the big screen this weekend with Thor.
Superman flies into theaters December 2012 directed by Zack Snyder starring, Henry Cavill as the Man of Steel, Diane Lane as Martha "Ma" Kent and Kevin Coster as Jonathan "Pa" Kent.
Be sure to check out the Cosmic Book News Superman Movie Hub for even more news and information.