Washington National Opera celebrates the return of the 12th year of the free opera broadcasts at Nationals Park with Opera in the Outfield on August 28.

Hosted by General Director Timothy O’Leary and WNO Artistic Director Francesca Zambello, the event will feature an outdoor broadcast of Rossini’s “Cinderella” on the high-definition Nationals Park scoreboard.

The event, which begins at 5 p.m., will also showcase a presentation of Kennedy Center Education Artist-in-Residence Mo Willems’s first opera, “Elephant & Piggie present SLOPERA!: A Bite-Sized Opera.” The 20-minute family opera features music from the Kennedy Center’s Composer-in-Residence Carlos Simon and is directed by long-time Kennedy Center collaborator Felicia Curry.

In a statement, O’Leary said, “One of our goals at the Washington National Opera is to make opera more accessible to everyone, and what a better way to return to that commitment than to welcome opera lovers and new friends back to Opera in the Outfield. Our signature community event offers something for everyone where friends and families can enjoy games, food, beer, and of course, one of our favorite productions under a starry sky on the big screen. So bring your blanket to sit on the field or grab a seat in the stands. We guarantee a good time for all with a shortened 90-minute version of Cinderella.”

The 2015 production stars Isabel Leonard, Maxim Mironov, Simone Alberghini, Paolo Bordogna, and Shenyang.

Ample free seating will be available in the stands and access to seating on the outfield grass will be limited on a first-come, first-served basis.