The Step Up actress and wife of Channing Tatum will be playing the other half of the couple known as 'The Lovers', according to Entertainment Weekly.
In March, Maroon 5 frontman Adam Levine was cast as the male half of 'The Lovers'. He will make his acting debut on the series.
Levine recently confessed that he was too scared to watch the first season of American Horror Story.
The FX series received 17 Emmy nominations earlier this month, tying for the most this year with Mad Men.
Tatum recently said that he would be willing to star in the Fifty Shades of Grey movie if his wife could be a co-star with him.
The second season of American Horror Story will premiere in October.