The Summer I Turned Pretty Season 3: Everything to Know About the TV Series’ Dramatic Conclusion

In The Summer I Turned Pretty season 3, Belly (Lola Tung) must choose between Jeremiah (Gavin Casalegno) and Conrad (Christopher Briney) once and for all.

In June 2025, Prime Video released the official trailer for the third season of The Summer I Turned Pretty series, which is based off the popular book series by Jenny Han. The trailer shows that season 3 picks up two years after Belly decided to be in a relationship with Jeremiah over his brother Conrad.

After two years together, Belly and Jeremiah shock their families when they reveal that they’re getting married. However, their plans seem to get more complicated when Conrad comes back into Belly’s life after previously moving to California.

The official season 3 synopsis explains that Belly is “looking forward to another summer in Cousins with her soulmate, Jeremiah,” and “her future seems set, until some core-shaking events bring her first love Conrad back into her life.”

“Now on the brink of adulthood, Belly finds herself at a crossroads and must decide which brother has her heart,” it continues.

Ahead, here’s everything to know about the third and final season of The Summer I Turned Pretty.

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

The main cast will return for season 3, including Tung as Belly, Briney as Conrad, Casalegno as Jeremiah, Sean Kaufman as Steven, Rain Spencer as Taylor and Jackie Chung as Laurel.

In June 2025, Deadline reported that two new series regulars had been added to the show’s third season: Isabella Briggs and Kristen Connolly.

Even more new faces joined the show’s recurring cast, including Sofia Bryant, Lily Donoghue, Zoé de Grand’Maison, Emma Ishta and Tanner Zagarino.

In June 2024, Kyra Sedgwick, who played Aunt Julia, shared that she is not returning for the show’s third season.

What will The Summer I Turned Pretty season 3 be about?

The Summer I Turned Pretty season 3 is based on Han’s third and final novel in the franchise, We’ll Always Have Summer. The book takes place two years after the events of It’s Not Summer Without You as Belly once again finds herself questioning where her heart lies between the Fisher brothers. Only in the third book, she finally makes a decision.

Though season 2 strays from the books in various ways, when PEOPLE spoke with the cast in June 2023, they all reiterated that a third season would likely follow the third book as much as possible.

“I know Jenny is really just strong on staying as true to the books as possible and hitting the main points,” Casalegno told PEOPLE. Meanwhile, Tung added, “There’s so many different ways you could go about it. There’s a blueprint of a book, which we’ve been lucky to have for two seasons now, just such a solid blueprint for us, and to have Jenny on set with us has been incredible.”

In her March 2025 interview with Entertainment Weekly, Han teased that the third season will honor the book’s two-year time jump and have some “surprises.” Though she didn’t reveal much about the plot, Tung did say that she admired how the author would never “do anything that doesn’t make sense for the story.”

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

Prime Video released the first teaser trailer for The Summer I Turned Pretty in April 2025, picking up where season 2 left off when Belly chose Jeremiah over Conrad. However, as the trailer shows, Belly is enjoying her relationship with Jeremiah in college until Conrad comes back into her life, turning her world upside down.

The teaser ends with the older Fisher brother arriving at the Cousins’ house as Belly opens the door for him. Like past trailers for the show, this one also featured multiple Taylor Swift songs.

In June 2025, Prime Video shared the official trailer for season 3 of The Summer I Turned Pretty. The dramatic trailer shows Belly and Jeremiah shocking her mom when they tell her that they are planning on getting married. The college students’ love seems sturdy — until Belly is reunited with Conrad in his new home of California.

“When I’m with J, everything is easier, but everywhere I go, there’s a memory of Conrad,” Belly narrates in the trailer.

After Belly and Conrad reconnect in California, things seem to get even more complicated. At one point, Belly’s best friend Taylor confronts Conrad over his intentions with Belly and asks whether or not he’s going to “blow up her whole life” because he “suddenly remembers that she exists.”

The trailer ends with Belly walking down the aisle in a wedding dress, but it’s unclear who she’s saying “I do” to.

Besides Belly’s love life, the trailer also teases that Taylor’s relationship with Belly’s brother Steven will continue. Meanwhile, Belly’s mom may also be exploring a new relationship with fellow newly-single writer Cleveland Castillo (Alfredo Narciso).

How many episodes will The Summer I Turned Pretty season 3 have?

Though Han previously revealed that the upcoming season will have a total of 10 episodes, Prime Video has since upped the count to 11, which is three more than the previous seasons.

When did The Summer I Turned Pretty season 3 film?

An industry source previously told PEOPLE that the show was “eyeing” to begin filming season 3 in Wilmington, N.C., in the spring — though “nothing firm” had been set by the studio yet. (Prime Video did not respond to PEOPLE’s request for comment.)

In May 2024, Prime Video confirmed that production was underway as they shared a clip of the cast, including Tung, Briney, Casalegno, Kaufman and Spencer, hanging out on the beach.

Filming also took place in Paris in October 2024 when fans shared footage on TikTok that showed Tung and Casalegno filming together.

When will The Summer I Turned Pretty season 3 be released?

As Prime Video announced that filming had begun for the new season in May 2024, they also announced when the show would return. In a video featuring the cast hanging out on the beach, Tung told the camera, “See you [in] Summer 2025!”

In April 2025, Prime Video revealed that The Summer I Turned Pretty season 3 begins streaming on July 16, 2025.

Will there be a season 4 of The Summer I Turned Pretty?

Seeing that the series is based on a trilogy of books, fans have wondered if the show will follow suit with only three seasons. Han confirmed with Entertainment Weekly that the July 2025 installment would conclude the series.

“Three books, three seasons,” said the author, who also serves as showrunner with Sarah Kucserka. “It feels right to me.”

Will there be a Summer I Turned Pretty spinoff?

Amazon execs teased in September 2023 that there could be a spinoff series in the works. While talking with Deadline, Vernon Sanders, head of television at Amazon and MGM Studios, teased that Amazon was “already hard at work developing complementary pieces.”

When pressed for more information, Sanders replied, “I will say stay tuned, but Jenny’s got some exciting surprises. So we’re thrilled about a season 3, and she’s got a vision for more.”