Yellowstone alum Kelsey Asbille is officially engaged to her longtime boyfriend, filmmaker and director Miles Joris-Peyrafitte. A source exclusively confirms to Us that they shared their engagement news with a small circle. According to the insider, the couple got engaged in Sicily after Asbille finished filming her upcoming movie The Kellys with Liam Hemsworth and Arnold Schwarzenegger. Joris-Peyrafitte hinted he popped the question earlier this month in an Instagram post, which read, “Big year.” The social media upload included a photo of Asbille holding up a piece of paper while flashing jewelry on her ring finger. (Us has reached out…