Her character will tie into the Liam (Mark Collier) storyline.
Back in 2010, Willis was asked to fill in as Chloe on DAYS when Nadia Bjorlin was ill, but the scenes never aired.
Willis will first air on April 22. The length of her stay on DAYS has not been announced.
Willis' credits after leaving GENERAL HOSPITAL include AMERICAN HEIRESS, THE L WORD and WITHOUT A TRACE.