Dec 21, 2012…
via TMZ: 
” Ashton Kutcher has finally pulled the trigger,
filing for divorce from Demi Moore over a year after
the couple split up. Ashton filed the docs today in L.A.
County Superior Court, citing irreconcilable differences. 
Sources familiar with the situation say Ashton waited so
long because he wanted to give Demi the chance to file first …
it was a whole dignity thing. After a year when Demi showed
no signs of making her move, Ashton finally did.”