Seventeen Again

A high-school student who relocates from California to Connecticut, navigating homesickness, bullying from Ashley, and a budding romance with Todd while adjusting to a blended family. She grapples with fitting in at a new school and staying true to herself in the face of social pressure. Her resilience helps move the family through the upheaval caused by Willie’s experiments.

Originally a father and husband who, along with Cat, regains his teenage form after Willie’s formula. As a teen again, he reconnects with Cat, reflects on past decisions, and ultimately seeks to repair his relationship with his family. His teen perspective adds complexity to the dance of reconciliation and responsibility.

A 12-year-old genius who tinkers in a home lab and wishes to beat aging. He creates an anti-aging formula, spills it accidentally, and must discover an antidote when his experiments backfire. His curiosity drives the plot, but his responsibility—and the safety of his grandparents—becomes the central concern.

A classmate of Sydney who becomes the object of her crush. He represents a doorway into a normal teen life in a new town, offering friendship and a possible romantic connection. His presence adds tension with Ashley, who is wary of losing control over her brother’s affections.

Todd's older sister and a primary bully who criticizes Sydney and resents the attention her brother shows toward her. Her hostility is a catalyst for Sydney’s assertiveness and for the film’s conflict at the school, culminating in a confrontation that catalyzes growth.

Sydney’s father who forbids Willie from continuing experiments until he learns responsibility. He embodies the parental caution that clashes with a child’s scientific curiosity and the family’s need to adapt to new circumstances.

Cat is transformed into a 17-year-old, experiences teenage romance with Gene, and later faces the consequences of the side effects. Her evolving relationship with Gene drives reconciliation, and her reversion to adulthood anchors the emotional heart of the story.

The teenage version of Gene, thrust into youth and romance again after the transformation. His renewed adolescence offers a chance to reevaluate past choices and the path toward mending family ties.

The teenage version of Cat, navigating teen life again while retaining a strong will. Her interactions with Gene and her own evolving identity add depth to the teen dynamic and to the couple’s eventual reconciliation.