Grace & Frankie is coming to an end. While fans are surely sad to see the mature-leaning scripted series conclude, there is one last surprise viewers can expect as they tune in to catch the final episodes.During an appearance on The Late Late Show with James Corden, Grace & Frankie star Jane Fonda teased a high-profile cameo fans will enjoy in the last episodes.“It’s not just that Dolly joins us,” the Oscar-winning actress began, “it’s the way that she is brought into the story that will knock your socks off.” Before she finished sharing, Fonda added, “It is so beautiful and so moving and unique.