Summit Entertainment has set Amanda Seyfried, Vanessa Redgrave, Gael Garcia Bernal and Franco Nero to star in “Letters to Juliet,” the Gary Winick-directed film that begins production June 25 in Italy.

Pic is based on a book by Lise and Ceil Friedman about the letters written by the lovelorn to star-crossed lover Juliet Capulet.

Story follows a couple (Seyfried, Garcia) who take a trip to Italy and receive a note meant for Juliet written by a woman (Redgrave) searching for a young man who romanced her during a long-ago vacation in Italy. The young woman scours Tuscany to find the older woman’s long-lost love (Nero).

Jose Rivera wrote the script with Tim Sullivan, and Mark Canton is producing with Ellen Barkin and Caroline Kaplan.

The project becomes the second romancer Summit has set for a June production start; the Robert Pattinson starrer “Remember Me” gets under way June 15.

Summit just wrapped the “Twilight” sequel “New Moon” and will shoot the third installment, “Eclipse,” in August. Summit is now shooting “Step Up 3” in New York and begins production on the Brendan Fraser starrer “Furry Vengeance” on July 6.

Seyfried is back in romance mode after “Mamma Mia!” She next stars with Megan Fox in “Jennifer’s Body” for Fox and then stars with Channing Tatum in “Dear John” for Sony.

Seyfried is repped by Innovative, Redgrave by CAA, Garcia Bernal by WME and Nero by Muse Management.