https://cdnph.upi.com/ph/st/th/9411781003171/2026/upi/b12dccac45bf8bc48bb59f5f94b94d72/v1.5/Season-2-of-Luke-Grimes-Marshals-is-now-filming.jpg" /> Production has begun in Park City, Utah, on Season 2 of the "Yellowstone" spin-off "Marshals," starring Luke Grimes, CBS announced Monday.