Michelle Pfeiffer to star in 'Yellowstone' spinoff 'The Madison': 'Excited for this!'

Michelle Pfeiffer is the latest star to join the "Yellowstone" universe.

The 66-year-old actress will lead the hit flagship series' spinoff show "The Madison," which she will also executive produce, Variety reported on Thursday. 

Pfeiffer confirmed the casting news in a post that she shared on her Instagram page. 

"This cats out of the bag," Excited for this! #Madison," the three-time Academy Award nominee wrote alongside a screenshot of the Variety article.

"Yellowstone"...