The actress will appear in a recurring guest-star role on the A&E drama's upcoming third season, according to Deadline.
Spiridakos will play the mysterious Annika Johnson, who shows up at the hotel in the new season premiere.
'Sons of Anarchy' actor Ryan Hurst also recently joined 'Bates Motel' as Chick Hogan, an intelligent ex-con with dark and menacing personality traits.
'Bates Motel' returns to the US in March 2015.