Demi Moore will mark her fourth wedding anniversary with husband Ashton Kutcher later this month by taking his last name as her own.

A source told The PEOPLE: “Demi didn’t want to change her name at first because it didn’t seem right but now she finally feels ready. “

The 48-year-old Blame It On Rio star made headlines when she married Kutcher, who is 15 years her junior, in 2005 after two years of dating.