As The Summer I Turned Pretty heads into its third and final season, Prime Video is expanding the ensemble, tapping a mix of up-and-comers and familiar faces to round out Belly’s last lap in Cousins Beach.
Isabella Briggs (Fatal Attraction, Sugar) and Kristen Connolly (The Cabin in the Woods, House of Cards) are joining as series regulars, while Sofia Bryant, Lily Donoghue, Zoé de Grand’Maison, Emma Ishta, and Tanner Zagarino are set for recurring arcs. The expanded cast comes as the show gears up for an 11-episode run, which drops Wednesday, July 16, 2025.
Created by Jenny Han and based on her bestselling book trilogy, the series has been a breakout YA draw for Prime Video, with season three set to wrap the long-running triangle between Belly, Conrad, and Jeremiah. Han exec produces alongside co-showrunner Sarah Kucserka.
Briggs, who made waves in Fatal Attraction and the Apple drama Sugar, is expected to play a major role in the coming storyline. Connolly, last seen in FBI: International and Ethan Coen’s Honey Don’t, brings prestige drama heat to the cast.
The recurring lineup includes Bryant (I Am Not Okay With This), Donoghue (Daisy Jones & the Six), Grand’Maison (Orphan Black), Ishta (Stitchers), and Zagarino, who recently appeared on Apple TV+’s Shrinking.
Filming wrapped earlier this year, setting the stage for what’s expected to be a high-stakes, emotionally messy sendoff for the hit coming-of-age romance.
