The characters' ages in "The Summer I Turned Pretty" series are as follows:
- Belly (Isabel Conklin) starts as 15 turning 16 in season 1, is 17 in season 2, and around 21 in season 3.
- Taylor is the same age as Belly: 16 in season 1, 17 in season 2, and 21 in season 3.
- Steven, Belly's older brother, is 17 in season 1, 18 in season 2, and 22 in season 3.
- Jeremiah is 16 in season 1, 17 in season 2, and 22 in season 3.
- Conrad is a bit older: 17 in season 1, 18 in season 2, and 23 in season 3.
This shows the characters start as teenagers in early seasons, with a four- year time jump bringing them into their early twenties by season 3.
