The Secret Circle star revealed on Twitter that he will appear in the FX drama's second run.
He wrote: "Pleased, honoured, humbled, and thrilled to announce that I'm joining the cast of American Horror Story next season."
The 27-year-old Zylka played Jake Armstrong on The CW's short-lived drama Secret Circle and can currently be seen as Flash Thompson in The Amazing Spider-Man.
He has also appeared in episodes of Cougar Town and 90210.
Other stars confirmed to appear in the new season of American Horror Story include Chloe Sevigny (Big Love), Joseph Fiennes (FlashForward) and Maroon 5 singer Adam Levine, making his acting debut.
New episodes will air on both FX and FX UK this autumn.
> Adam Levine 'too scared to watch American Horror Story'
Watch a promo for season one of American Horror Story below: