Albert Peterson: an aspiring English teacher and poet who wrote a song for Conrad Birdie, launching him into the music business as Conrad's agent. Albert is in love with Rosie Alvarez.
Rosie Alvarez: the girlfriend and secretary of Albert Peterson. She concocts the scheme to produce publicity for Albert with the intention of marrying him. Rosie is opinionated and strong-willed.
Conrad Birdie: Elvis-like character who is drafted into the army. He causes girls and women to faint with a swing of his hips.
Kim MacAfee: a 16-year-old girl who is picked to be kissed by Conrad Birdie before he joins the army. She is Hugo Peabody's girlfriend and the president of the Conrad Birdie Fan Club.
Harry MacAfee: Kim's father, who wrestles with the idea of his 16-year-old daughter kissing an older man on television. Harry is easily persuaded when fame is on the line.
Doris MacAfee: Kim's mother.
Randolf MacAfee: Kim's younger brother.
Hugo Peabody: Kim's boyfriend. Hugo is very unsupportive of her high-profile kiss with Conrad.
Mae Peterson: Albert Peterson's overbearing mother.
Ursula Merkle: Kim's best friend. She is the most enthusiastic Conrad Birdie fan represented in the production.
Gloria Rasputin: a woman whom Albert's mother finds on the train to replace Rosie as secretary. She wants to get into show business.
Sweet Apple Teens: Alice, Margie, Nancy, Helen, Deborah Sue, Penelope Ann, Harvey, Freddie, Carl
Sweet Apple Adults: Mayor, Edna, Lee, Phyllis, Charles Maud (Quartet Member), Maud’s Dishwasher (Quartet Member)
Adult Ensemble/Children’s Ensemble: various citizens of Sweet Apple
