E! News said Monday Orosco proposed to Benz at a Mexican-fiesta-themed surprise party at their Los Angeles home.
Where and when the wedding is to take place hasn't been announced yet, however.
Benz is best known for her work on TV's "Buffy the Vampire Slayer," "Angel," "Taken," "Dexter" and "No Ordinary Family."
Notable deaths of 2014 [PHOTOS]