The Fargo co-stars, who play husband and wife on the hit series, packed on the PDA at FOX's 2016 Emmys after-party. An eyewitness tells E! News exclusively that at one point during the evening Dunst "leaned into Jesse and very passionately kissed him on the lips after she caressed his cheek very affectionately."
Plemons and Dunst arrived at the after-party together and appeared "to be very much a couple," the insider adds. "They've been stuck to each other's sides all night."
After they hit up the Fox party, the couple made their way to host Jimmy Kimmel's after-party where they danced the night away and continued their kissing spree, another source tells E! News.
E! News has reached out to reps for comment.