Amanda Seyfried, the star of this summer’s box office hit musical “Mamma Mia!,” is set to star in the big-screen adaptation of Nicholas Sparks’ bestseller “Dear John.”

Variety reports she's joining Channing Tatum in the upcoming drama, which Lasse Hallstrom is directing for Relativity and Screen Gems.

In the adaptation by Jamie Linden (“We Are Marshall”), a young woman falls on love with a solider while he’s on leave.

Seyfried, who played Sophie Sheridan in the big-screen version of “Mamma Mia!,” also starred in “Mean Girls” and “Alpha Dog.”

She currently has two new projects awaiting release: Duncan Ward’s “Boogie Woogie” and Karyn Kusama’s “Jennifer’s Body,” a horror comedy written by Diablo Cody.

The next Nicholas Sparks novel to hit the silver screen is “Nights in Rodanthe,” which is scheduled to open Sept. 26.