Jeremiah Fisher (The Summer I Turned Pretty) – Actor, Age, and Character Guide

Jeremiah Fisher is a central figure in the hit Amazon Prime series The Summer I Turned Pretty. As the younger Fisher brother and one of Belly Conklin’s primary love interests, his journey from a charming, carefree teen to a more complex and controversial character has fueled endless fan debate. This profile covers everything from the actor who brings him to life to the character’s age, personality, and the big questions surrounding his role in the story.

Who Plays Jeremiah Fisher?

The character of Jeremiah Fisher is portrayed by American actor Gavin Casalegno. Born on September 2, 1999, in Dallas, Texas, Casalegno was 22 years old when the first season premiered in 2022. As of 2026, he is 26 years old.

While Casalegno is best known for this role, his acting career includes earlier work in film and television. He is married to Cheyanne King; the couple tied the knot in 2024.

Key Insights on Jeremiah Fisher

• Jeremiah Fisher is a central figure in the love triangle of The Summer I Turned Pretty.
• The character’s personality is often described as insecure but charming, leading to mixed fan reactions.
• Gavin Casalegno’s portrayal has been praised for bringing depth to the character.
• The controversy around Jeremiah stems from his actions in later seasons, particularly his manipulative behavior.
• There is a demand for clarity on the character’s future after season 3.
• Gavin Casalegno is significantly older than the character he plays; the actor is 26 while Jeremiah is a teenager.

Jeremiah Fisher: Key Facts

Gavin Casalegno’s full name is Gavin Perry Casalegno, as recorded on his Wikipedia page. His IMDb profile lists his credits and confirms his marriage to Cheyanne King.

What Is Jeremiah Fisher’s Role in The Summer I Turned Pretty?

Jeremiah Fisher is a main character and one of the two romantic leads in the series. He is the younger brother of Conrad Fisher, and the three-part love triangle between Belly, Jeremiah, and Conrad is the central conflict of the show.

Jeremiah Fisher’s Role in Season 1

Introduced in Season 1, which premiered in 2022, Jeremiah is portrayed as the fun-loving, easygoing sibling. He has a close, playful relationship with Belly, though their dynamic begins to shift as deeper feelings emerge. The character is in his late teens, with sources placing him at around 17 years old at the beginning of the series.

Jeremiah Fisher’s Relationship with Belly

Belly Conklin is one of Jeremiah’s main love interests across the story. The love triangle is the core romantic conflict of the series. The tension between fans who prefer Conrad and those who support Jeremiah has made the character deeply divisive.

Character Development Across Seasons

The show’s version of Jeremiah is not identical to the book version. The adaptation adjusted the character to fit a television narrative, including a more explicitly queer portrayal. Jenny Han, the author of the book series, has described Jeremiah as “sexually fluid.” This change has contributed to debate about whether the character is better developed on screen or whether the adaptation strayed too far from his original identity.

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