The Scott Pilgrim actress, who plays apathetic assistant April Ludgate, revealed details about her character's relationship with Andy Dwyer (Chris Pratt) on the Emmys red carpet on Sunday.
Plaza told TV Line: "April and Andy are married, so we get to see them be a married couple - which is amazing because they're so weird. And they still live with Ben, Adam Scott's character, and they're a weird little threesome in the house."
She continued by hinting that Leslie Knope (Amy Poehler) may be "going on the campaign trail" and that the storyline could be related to Andy's new job.
Plaza said: "Andy gets a new job - he takes it very seriously and he wears a suit. Seeing how everyone fits into [the campaign] is going to be pretty awesome."
Pratt recently praised Parks and Recreation's fourth season as the "best" yet.
Executive producer Michael Schur said in the summer that he expects April and Andy to remain happy for the time being.
Parks and Recreation returns on Thursday, September 22.
Watch Andy's Pearls of Wisdom below: