SPLITS After four years of marriage, musician Joe Jonas, 34, filed for divorce from Game of Thrones actress Sophie Turner, 27, calling the marriage “irretrievably broken.” The two are parents to Willa, 3, and Delphine, 1. Australian actors Hugh Jackman, 54, and Deborra-lee Furness, 67, who wed in 1996, announced their separation with a September statement to People saying, “We undertake this next chapter with gratitude, love and kindness.” Yellowstone star Kevin Costner, 68, and Christine Baumgartner, 49, who share three children, announced their split in May after 18 years. (An ugly public battle over child support followed.) Modern Family’s Sofia Vergara, 51, and Magic Mike’s Joe Manganiello, 46, who wed in 2015, announced their breakup in July. After meeting on the Bravo reality show Vanderpump Rules in 2013, Tom Sandoval, 40, and Ariana Madix, 38, announced in March that they were breaking up in the midst of the world-shaking Scandoval:…