Confirmed Cast And Characters Of The Summer I Turned Pretty Season 3: Everything You Need To Know

As of December 2025, the anticipation for the third and final season of the beloved Prime Video series, The Summer I Turned Pretty (TSITP), has reached a fever pitch, with the full cast list and a premiere date confirmed for the summer. This highly-awaited installment, which adapts the final book in Jenny Han’s trilogy, We’ll Always Have Summer, promises to deliver the ultimate resolution to the Belly-Conrad-Jeremiah love triangle, bringing back all the familiar faces of Cousins Beach for one last, emotional summer.

The core cast is officially set to return, ensuring fans will see the stars who brought Isabel "Belly" Conklin and the Fisher brothers to life, along with new additions who will introduce fresh drama and dynamics to the narrative. With filming wrapped and post-production nearing completion, the final chapter is ready to debut, offering 11 episodes—three more than the previous seasons—to conclude Belly’s journey of love, friendship, and self-discovery.

The Returning Main Cast: Full Biography and Profile

The heart of The Summer I Turned Pretty lies in its central trio and their families. The following actors are confirmed to reprise their roles for the final season, bringing their characters’ stories to a definitive close.

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• Lola Tung as Isabel "Belly" Conklin
  • Biography: Born in 2002 or 2003, Lola Marie Tung is an American actress, singer, and model. She is best known for her breakout role as Belly Conklin, which was her first major on-screen role. Tung graduated from Fiorello H. LaGuardia High School of Music & Art and Performing Arts in New York City in 2020.
  • Character Arc: Season 3 will see Belly navigating the aftermath of her choice between the Fisher brothers, dealing with the complexities of a long-term commitment, and facing the realization that the idyllic summers at Cousins Beach are changing forever.
• Christopher Briney as Conrad Fisher
  • Biography: Christopher Thomas Briney, born March 24, 1998, is an American actor and filmmaker from Connecticut. He studied acting at Pace University in New York City, graduating with a bachelor's degree. Beyond TSITP, he is also recognized for his work in the film Dalíland.
  • Character Arc: Conrad's journey has been marked by emotional depth and internal conflict. In the final season, he will confront his feelings for Belly, his relationship with his brother Jeremiah, and his future, possibly involving Stanford University, as he seeks his own closure.
• Gavin Casalegno as Jeremiah Fisher
  • Biography: Born September 2, 1999, Gavin Perry Casalegno is an American actor from Dallas, Texas. He started his career as a child actor, appearing in the 2011 thriller Hear Me Whisper. His role as the charismatic Jeremiah Fisher has cemented his status as a teen idol.
  • Character Arc: Jeremiah ended Season 2 in a relationship with Belly, but the final season, based on the source material, will test the stability of their bond and force him to confront the long shadow of his brother’s connection to Belly.

Other essential returning cast members who provide the foundational emotional support and adult perspectives for the series include:

• Jackie Chung as Laurel Park (Belly's mother)
• Sean Kaufman as Steven Conklin (Belly's older brother)
• Alfredo Narciso as Cleveland Castillo (Laurel’s love interest)
• Kyra Sedgwick as Julia (Aunt Susannah’s half-sister)
• Elsie Fisher as Skye (Julia’s child)
• Rain Spencer as Taylor Jewel (Belly’s best friend and Steven’s love interest)

New Faces at Cousins Beach: Introducing the Season 3 Ensemble

The third season introduces several new actors and characters to the narrative, expanding the world beyond the core families and setting the stage for the dramatic events of the final summer. These new additions are expected to play pivotal roles in the lives of Belly and the Fisher brothers, adding new layers of conflict and relationship dynamics.

The officially confirmed new cast members for The Summer I Turned Pretty Season 3 include:

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• Isabella Briggs as Denise: Briggs joins the cast in a key role as Denise, a new entity whose exact connection to the main trio remains a closely guarded secret, but is expected to shake things up.
• Kristen Connolly: The nature of Connolly’s role is currently unconfirmed, but her involvement suggests a significant new adult presence, possibly connected to the Fisher family or the future of the beach house.
• Sofia Bryant: Known for her role in I Am Not Okay With This, Bryant’s character is anticipated to bring a new dynamic to the group, perhaps as a new friend, rival, or love interest.
• Lily Donoghue: Donoghue, known for her work in Jane the Virgin, is another fresh face whose character details are being kept under wraps to maintain the plot’s surprise elements.
• Zoé de Grand’Maison: Her addition hints at further expansion of the Cousins Beach social circle, potentially introducing a character from the broader Boston/New England social scene.
• Emma Ishta: Ishta’s casting adds another experienced actress to the ensemble, suggesting a role with considerable narrative weight.
• Tanner Zagarino: Zagarino’s presence is likely to add another layer to the younger cast’s interactions, possibly a new friend or a romantic complication for one of the main characters.

The introduction of these new characters indicates that the final season will not only focus on the central love triangle but also explore the characters’ expanding lives as they move into college and young adulthood, a key theme of the third book.

Plot, Release Date, and Production Status of the Final Season

The final season of The Summer I Turned Pretty is set to premiere on July 16, 2025, exclusively on Prime Video. The season will feature a total of 11 episodes, an increase from the eight episodes of the previous two seasons, allowing for a more thorough adaptation of the final book, We’ll Always Have Summer.

Adapting the Final Book: We'll Always Have Summer

Season 3 will closely follow the events of the third novel, which is known for its dramatic shift in tone and high-stakes emotional decisions. The central conflict will revolve around Belly and Jeremiah’s relationship hitting a major snag, forcing Belly to confront her true feelings for Conrad Fisher. The narrative will explore themes of maturity, college life, long-distance relationships, and the ultimate choice that defines Belly’s future. The return to the iconic Cousins Beach house will serve as the backdrop for this intense final chapter, a place of both cherished memories and difficult truths.

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Production Timeline and Finality

Filming for the third season officially wrapped in 2024, with post-production continuing until June 2025, ensuring a polished and timely summer release. Show creator and author Jenny Han has confirmed that Season 3 will be the series' final installment, providing a definitive end to the story she began in her novels. This finality guarantees that all lingering questions—specifically, who Belly ends up with—will be answered, making it one of the most anticipated streaming events of the year. The extended episode count is a promising sign that the production team is committed to giving the beloved characters a comprehensive and satisfying conclusion.

The combination of the returning established cast, the intriguing new characters, and the high-stakes plot from the source material guarantees that The Summer I Turned Pretty Season 3 will be an unforgettable and emotional farewell to the beloved teen drama series.