Johansson430.jpgFirst Mila Kunis, then Betty White, and now newly-single Scarlett Johansson has been added to the list of sexy stars invited to the Marine Corps Ball on Nov 10, via YouTube.

But unfortunately for Sgt. Dustin L. Williams, the Iron Man star already has plans!

Johansson graciously declined the Marine's request, but said she felt "incredibly honored" to have received an invite, and even praised him for his "cheeky filmmaking", but regrets she would not be able to attend due to "prior commitments".

The actress did send over a big case of Möet and Chandon Champagne with her gratitude and expressed:

    "In my absence, I raise a glass to you and all the men and women of the U.S. Marine Corps, past and present, in thanks for your continued commitment to preserving the safety of our nation."

It looks like Mila Kunis will be the only movie star at the Ball -- as of yet!

Check out the entire video Sgt. Williams made for Scarlett, after the jump ...