The Summer I Turned Pretty Season 3: Final Episodes, Cast, Ending

If you’ve spent any summer watching Belly Conklin navigate her impossible choice between two Fisher brothers, you already know the final season was always going to be a gut punch. The third and final season of The Summer I Turned Pretty landed on Prime Video on July 16, 2025, and wrapped up on September 17, 2025 — but the love triangle’s resolution has left fans with plenty of questions about what actually happened, who ended up with whom, and whether the show stuck the landing.

Season 3: 11-episode final season on Prime Video · Premiered: July 16, 2025 · Renewed: August 2023 · Finale: September 17, 2025

Quick snapshot

1Confirmed facts

Season 3 premiered July 16, 2025 on Prime Video (Amazon’s official announcement)
11 episodes total (About Amazon)
Finale aired September 17, 2025 (BBC News)
Season 3 is the series’ final season (USA Today)

2What’s unclear

Whether the show explicitly shows Belly and Conrad’s wedding on screen (BBC News recap suggests a Paris reunion, not a wedding)
Whether the adaptation includes Belly’s virginity loss scene from the book (BBC News recap)
Jeremiah’s exact endgame relationship status in the finale (BBC News recap)

3Timeline signal

August 2023: Series renewed for season 3 (Amazon)
July 16, 2025: Two-episode premiere (USA Today)
Weekly drops every Wednesday through September 17, 2025 (Harper’s Bazaar)

4What’s next

No season 4 planned — the series is a finite adaptation of Jenny Han’s trilogy (USA Today)
Fans can stream all three seasons now on Prime Video (USA Today)
Jenny Han is developing other projects, including a XO, Kitty spin-off continuation (USA Today)

The eight key facts below give you the quick-reference essentials before we dig into the love triangle’s final chapter.

Fact	Value
Full title	The Summer I Turned Pretty
Seasons	3 (season 3 is final)
Episode count (season 3)	11
Streaming platform	Prime Video
Renewal announcement	August 2023
Premiere date	July 16, 2025
Creator	Jenny Han
Source material	Book trilogy by Jenny Han

Is there a season 3 for The Summer I Turned Pretty?

Yes — and not only is there a third season, it’s the last one. Prime Video renewed the series for a supersized third season in August 2023, as reported by the official newsroom (see snapshot). The 11-episode final season adapts the third book in Jenny Han’s trilogy, We’ll Always Have Summer.

How many episodes are in season 3 of TSITP?

Season 3 consists of 11 episodes, making it the longest season of the series (season 1 had 7, season 2 had 8). The episode titles include Last Season (episode 1) and Last Supper (episode 3), according to Rotten Tomatoes’ episode guide and a Harper’s Bazaar schedule.

When does The Summer I Turned Pretty season 3 come out?

The season premiered on July 16, 2025 at 12:00 a.m. PT / 3:00 a.m. ET exclusively on Prime Video. The first two episodes launched together on premiere day, then followed a weekly Wednesday drop schedule. The 11th and final episode aired on September 17, 2025.

Where can I watch The Summer I Turned Pretty season 3?

All 11 episodes stream exclusively on Prime Video. To watch, you need an active Prime subscription. The previous two seasons are also available on the platform.

Is there a trailer for The Summer I Turned Pretty season 3?

Yes — Prime Video released the official season 3 trailer in June 2025. It’s available on the platform’s YouTube channel and within Prime Video’s season 3 page. The trailer shows the wedding setup, Belly torn between the brothers, and emotional scenes at Cousins Beach.

Bottom line: Season 3 exists, it’s 11 episodes long, premiered July 16, 2025, and wrapped up September 17, 2025 — all on Prime Video. No season 4 is coming.

The trade-off

A supersized final season meant the show had room to linger on every relationship’s last moments — but it also meant fans had to wait nearly two years after season 2 for closure. For casual viewers, the 11-episode arc is a single binge; for devoted fans, the weekly drip felt like an extended goodbye.

Who is in The Summer I Turned Pretty season 3 cast?

The core ensemble returns in full force. The main cast members are all back for the final season.

Do the main cast members return for the final season?

Lola Tung as Belly Conklin
Christopher Briney as Conrad Fisher
Gavin Casalegno as Jeremiah Fisher
Sean Kaufman as Steven Conklin
Rain Spencer as Taylor Jewel
Jackie Chung as Laurel Park

Supporting actors including Alfredo Narciso (Cleveland Castle) and Kyra Sedgwick (Julia) also return. The show’s creator Jenny Han continues as showrunner and executive producer.

Are there new characters in The Summer I Turned Pretty season 3?

Season 3 introduces a few fresh faces, though the show hasn’t released a full official cast list. Based on the book’s plot, viewers can expect characters tied to the wedding storyline and to Belly’s college life at Finch. No major new romantic interests are introduced beyond what the book already provides.

Bottom line: The entire main cast returned. No one bailed before the finale. Lola Tung, Christopher Briney, and Gavin Casalegno carry the love triangle to its finish.

Did Belly sleep with both brothers?

This is one of the most debated questions from the books, and the answer depends on whether you’re talking about the source material or the TV adaptation. In the books, yes. In the second book, It’s Not Summer Without You, Belly loses her virginity to Conrad during a moment of emotional intimacy. The show’s second season included bedroom scenes between Belly and Conrad, but the explicit context of virginity loss is handled differently in the adaptation — the show does not directly state she lost her virginity to him on screen. The third season references their past physical relationship but does not revisit the specific first-time moment.

Belly and Jeremiah’s intimacy: In the third book, Belly and Jeremiah have a physical relationship during their engagement. The show’s third season includes scenes of them together, but whether it mirrors the book’s level of explicitness is unclear from available sources. The season focuses more on emotional betrayal than on physical details.

Bottom line: In the book, Belly has sex with both