The All Good Things actress was spotted wearing her engagement ring at the Palm Springs Film Festival. I loved Kirsten’s work for a long time, and I was really excited once I’d met her, and she’s a great person, and we’re both actors that just… have fun with the material..On working as Dunst’s husband on Fargo, Plemons earlier said, "It was a gift."Dunst had also revealed that she would like to start a family in a recent interview.Rumours that Dunst and Plemons are dating, started doing the…