E! News learned that Kirsten Dunst is engaged to her former Fargo co-star Jesse Plemons! News of the couple's engagement was first reported by Page Six Tuesday, while Dunst's mom later confirmed it on Facebook. The 34-year-old actress recently showed off her gorgeous engagement ring at the Palm Springs Film Festival. Dunst and Plemons have kept their relationship quiet since they were spotted kissing in May, about a month after she and Garrett Hedlund split.