The Definitive Ending: 5 Shocking Ways 'The Summer I Turned Pretty' Book Trilogy Ends And What Season 3 Will Change

The ultimate question for every fan of The Summer I Turned Pretty—who does Belly end up with—has a definitive answer in the original book trilogy, but the on-screen adaptation is gearing up for a major, heart-wrenching twist. As of December 14, 2025, the final season, Season 3, is confirmed to premiere on Prime Video on July 16, 2025, and will cover the events of the third and final book, *We'll Always Have Summer*. Showrunner and author Jenny Han has already signaled that the TV series finale will deviate significantly from the source material, meaning the beloved love triangle between Belly, Conrad, and Jeremiah is far from settled, even for those who've read the books.

The journey of Isabel "Belly" Conklin (Lola Tung) through her transformative summers at Cousins Beach has captivated a global audience, but the emotional stakes are higher than ever as the show prepares to adapt the final chapter. While the books conclude with a clear choice for Belly, the show's narrative changes—such as the intimate scenes between Belly and Conrad in Paris—have set the stage for a finale that is both familiar and entirely unexpected.

Isabel "Belly" Conklin: A Character Biography and Final Choice Profile

Belly's tumultuous journey from a shy teenager to a young woman navigating grief, love, and self-discovery is the heart of the series. Her life is inextricably linked to the Fisher brothers, Conrad and Jeremiah, and the matriarchs who brought them together, Laurel Conklin and Susannah Fisher.

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• Full Name: Isabel "Belly" Conklin
• Portrayed By: Lola Tung
• Family: Laurel Conklin (Mother), Steven Conklin (Brother), John Conklin (Father)
• Key Relationships: Conrad Fisher (First Love, Endgame in Books), Jeremiah Fisher (Boyfriend, Second Love)
• Hometown: Philadelphia, Pennsylvania
• Summer Destination: Cousins Beach, Massachusetts
• College (Book 3): Brown University
• Book Trilogy: The Summer I Turned Pretty, It's Not Summer Without You, We'll Always Have Summer
• Book 3 Plot Focus: A two-year time jump, a proposal, a broken engagement, and a wedding.
• Final Book Choice: Conrad Fisher.

The final book, *We'll Always Have Summer*, is the blueprint for the upcoming Season 3, but fans should prepare for a completely new experience. The core of the final story involves Belly making a choice that defines her future, moving on from the past, and ultimately choosing the person she wants to spend her life with.

The Definitive Book Ending: Who Belly Marries and Why

For those seeking the canonical ending from the pages of Jenny Han's trilogy, the answer is clear: Belly ends up marrying Conrad Fisher. The final book, *We'll Always Have Summer*, details a complex, two-year time jump after the events of the second book. This time jump finds Belly and Jeremiah in a serious, committed relationship during college.

Their relationship takes a dramatic turn when Jeremiah proposes to Belly, largely in response to a fight they have and a moment of insecurity. Belly, feeling the pressure and believing it's what she truly wants, accepts, leading to a planned wedding. This engagement becomes the central conflict of the final book, as it forces all parties—Belly, Jeremiah, Conrad, Laurel, and Steven—to confront their true feelings and the legacy of Susannah's death.

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The relationship with Jeremiah ultimately crumbles under the weight of their unresolved feelings and the realization that their love is not the forever kind. Belly breaks off the engagement, leading to a period of estrangement from both brothers. After a significant period of self-reflection and growth, Belly and Conrad eventually find their way back to each other. The book concludes with a flash-forward to their wedding day at Cousins Beach, where they finally say "I do," solidifying Conrad as Belly's endgame.

Key Plot Points and Confirmed Changes for Season 3

The adaptation of *We'll Always Have Summer* in Season 3 is the most anticipated event for fans. While the show will follow the general arc, Jenny Han has been vocal about making changes to serve the on-screen narrative and the characters' development. The season will consist of 16 episodes, giving the story ample room to breathe.

1. The Two-Year Time Jump

Season 3's official synopsis confirms that the story will pick up at the end of Belly's junior year of college, aligning with the significant time jump in the book. This jump is crucial because it allows Belly and Jeremiah's relationship to mature—and eventually fail—while also giving Conrad time to focus on his studies and personal growth at Stanford.

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2. The Engagement and the Breakup

The core conflict of the book—Jeremiah and Belly's engagement—is highly likely to be a major storyline. However, the emotional context and the ultimate fallout may be altered. The show has already established a deeper, more physically intimate relationship between Belly and Conrad than the books did, which could shift the dynamics of the final breakup with Jeremiah.

3. Belly's Self-Discovery and College Life

The book's ending emphasizes Belly's journey of choosing herself first, moving in with friends, and focusing on her studies before reuniting with Conrad. The TV show will likely expand on her time at Brown University and her life outside the Fisher family's orbit, showcasing her independence before she makes her final, adult choice. The ending is less about who she chooses and more about her choosing herself, which leads her back to Conrad.

The Final Verdict: Why the Show's Ending Will Be Different

Jenny Han has explicitly stated that the TV show's ending will be different from the books, primarily because the story is being told through a different medium and with different pacing. The show has given Jeremiah Fisher (Gavin Casalegno) and Conrad Fisher (Christopher Briney) equal emotional weight, making Belly's (Lola Tung) final decision a much tougher, more earned moment for the audience.

By the end of Season 2, Belly chooses Jeremiah, leaving the audience with a "Jelly" relationship that is strong, but ultimately challenged by the lingering, unresolved feelings between Belly and Conrad. The final season will spend a significant portion of its time breaking down the Jeremiah relationship before building up to the inevitable "Bonrad" reunion. The key difference may not be *who* she chooses, but *how* and *when* she chooses him, potentially making the wedding a more immediate event or even changing the final scene entirely to focus on a future beyond the wedding day, perhaps showing them simply happy together at Cousins Beach. Ultimately, the show's finale will be a fresh, unique take on a beloved story, ensuring that even book readers are on the edge of their seats until the very last episode.