Taylor Sheridan's Tulsa King has added a Yellowstone star to the line-up. In an exciting new development, Gretchen Mol, who previously appeared as Evelyn Dutton, the late wife of Kevin Costner's John Dutton , has signed on for season four. According to Deadline , the actress, whose TV credits include Boardwalk Empire and American Gigolo , will join Tulsa King as a series regular, with her character confirmed as Amanda Clark, a politician who is expected to cross paths with Dwight Manfredi ( Sylvester Stallone ). Sharing the news on Instagram , Gretchen, 53, told fans she was "So excited to join this show!"

© Getty Images for Tribeca Festiva Gretchen Mol will play Amanda Clark, a Tulsa politician

Following Gretchen's signing, the actress will reunite with Terence

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