"Divergent" cast Shailene Woodley just showed what eating clay does to a person as she graces the cover of In Style magazine looking slim as ever. In another development, Oscar winner Octavia Spencer was tapped to join "The Fault in our Stars" actress in "Insurgent", the sequel of the film franchised based on Veronica Roth's bestselling novel.

When interviewed during the "David Letterman Show," 22-year-old actress confirmed to the comedian host that she does eat clay, although she quickly added that the buyer should get it from a reputable source to make sure that it's already undergone a process that would not be harmful to the body.

"Clay is one of my favorites," "Divergent" cast Shailene Woodley said. "Clay binds to other material in your body and helps your body excrete those materials that are not necessarily the best for you."

"Divergent" cast graces the cover of In Style June issue wearing Dolce & Gabbana floral dress and a pair of tangerine sandals. She recently finished filming "The Fault in our Stars" which is about a high school student finding romance in the middle of her battle with cancer.

She also told the magazine that she's never been happier about the way she looks because her body is "exactly where it wants to be."

"I feel like I'm a woman. My boobs shrank. No one tells you that when you lose weight. No bra, no problem," she said.

Meanwhile, Octavia Spencer is expected to bring gravitas to her role as Johanna, the Amity faction leader, in "Insurgent," the sequel to the successful "Divergent," which will be directed by Robert Schwentke, HollywoodLife.com said.

"Divergent" cast Shailene Woodley will reprise her role as the rebellious Tris while Theo James will also be back as her love interest, Four.

"Insurgent" will open in theaters on March 20, 2015. The third and final installments, "Allegiant: Part 1" and "Allegiant: Part 2" will be released on March 18, 2016 and March 24, 2017.