The new season of the American television series The Simpsons is kicked off with a musical episode . The first episode of the 33rd season is almost all singing, executive producer Matt Selman told Variety magazine .

“It will be like a Broadway musical with all original songs,” Selman says of the first episode The Star of Backstage . The musical edition features a guest role for Frozen actress Kristen Bell, who will provide the singing voice of the character Marge Simpson.

The new season will premiere on September 26. The Simpsons is not only the longest-running American animated series, but also the longest-running American TV series.