Johnston ("3rd Rock from the Sun," The Women) and Weber ("Jeffrey," "Wings") will be joined by Amy Pietz ("Private Practice," "The Office") for the production that will run through Dec. 9. Bart DeLorenzo will direct.
All LATW performances are recorded and broadcast on LATW's nationally syndicated radio theatre series, "The Play's the Thing."
Here's how it's billed: "In a Fire Island beach house, a brother and sister and their respective spouses gather to celebrate the Fourth of July. With food, cocktails, fireworks and stinging barbs, they fortify themselves against their individual anxieties—and their gay neighbors partying in the houses on either side."