Characters in The Rosie effect

Don Tillman

Genetics professor with a rigidly logical approach to life, now navigating marriage and impending fatherhood.

Also in The Rosie Project, The Rosie Result

Gene

Also in The Rosie Result

Claudia

Dave the Baseball Fan

Lydia

Rosie Jarman

Don's wife, completing a medical degree and PhD in New York while pregnant with their first child.

Also in The Rosie Project, The Rosie Result

Gene Barrow

Don's old friend and mentor, separated from his wife and staying with Don and Rosie.

Also in The Rosie Project, The Rosie Result