"The Summer I Turned Pretty" Cast: Who's Single and Who's Taken?

Christopher Briney — who plays the older son of Susannah, Conrad — is dating actor Isabel Rose Machado. The pair both attended Pace University and majored in acting for film, television, voice over, and commercial, according to their official online résumés, so that's likely that's how they met. Their posts together on Instagram date back to 2018; however, it's unclear when they became romantically involved.

Machado walked the red carpet with her beau for the NYC premiere of "The Summer I Turned Pretty" in 2022, and the pair appear to still be going strong in 2023. Briney shared photos of the pair on vacation at a Sandals resort in Grenada on Instagram in May 2023.