Overview

• At the Sept. 4 New York premiere, Sam Keeley said mastering the Philadelphia dialect was a “nightmare” and that it only clicked after he arrived in the city.
• Keeley credited coach Susanne Sulby with guiding his vowel work and helping him find the Delco rhythm.
• Tom Pelphrey called the accent a “great challenge,” citing constant access to Sulby and real-life listening to keep him honest.
• Mark Ruffalo has described the dialect as unusually difficult in recent interviews, praising Sulby’s sustained work with the cast on set.
• The seven-episode series, set in Delaware County, premiered Sept. 7 on HBO with new episodes Sundays at 9 p.m. ET/PT and streaming on HBO Max.