In "The Tonight Show Starring Jimmy Fallon," the "Wednesday" star said she has been a CARAT for five years now, as she started fangirling on the K-prop group.

Emma also explained to the American host why the K-pop group is called SEVENTEEN when it has only  members."Thank you Emma and Jimmy! Hope to see you soon," SEVENTEEN said, retweeting the video.

Emma has been trending on Twitter the whole day after her guesting, and SEVENTEEN also reacted to the clip of her gushing over the group.

Emma played Enid Sinclair in the hit Netflix series "Wednesday." She is the roommate and friend of main character Wednesday Addams, who is played by Jenna Ortega.