ABC News Investigative Reporter Peter Charalambous talks about how Taylor Swift and Travis Kelce are officially engaged. The pop star and Kansas City Chiefs tight end shared the joyous news in a joint Instagram post Tuesday, with Swift writing in the caption, "Your English teacher and your gym teacher are getting married." The post included several photos from the couple's engagement, including a snap of Kelce down on one knee. The post also included a photo of Swift's ring, which ABC News confirmed is a brilliant old-mine cut diamond designed by Kelce and Kindred Lubeck of Artifex Fine Jewelry in New York City.