Francesca "Frankie" Thomas (Caitlin Stasey) is the leader of the first generation of The Sleepover Club.
Her full name is Francesca, but she states that: "Funny thing is, Francesca Thomas never feels like me. I'm Frankie. Francesca Thomas is some girl who gets into trouble all the time. Actually, she should really get her act together."
Her ambition in life is to become a famous actress.
Although a great friend to the girls, her bossiness becomes an issue on more than one occasion. Among the girls of the Sleepover Club, her best and oldest friend is Kenny. She has a secret and big crush on the leader of the M&M: Matthew. She has a dog called Megs.
Frankie's cooking is horrendous.
Frankie is pretty small, has dark-pale skin and brown eyes and hair. She is a girl who doesn't like to dress up.
- Father: Mr. Thomas
- Mother: Helena Thomas
- unborn sister
- Cousin: Charlie Anderson
- Aunt: Ellie Anderson
- Uncle: Mr. Anderson
She appears in every episode of the first season and in the first episode of the second season as Guest Star.
Frankie tells the viewers the club's adventures in most of the episodes and is also the only one of the original Sleepover Club to appear in the second season, though only in the first episode.
The episodes in which she acts as a narrator are the following:
- Perfect Match (1x01)
- Beach Hut (1x03)
- Car Wash (1x11)
- Outdoor Trip (1x12)
- The Winning Ticket (1x20)
- Graffiti (1x25)
- What Are Friends For? (2x01 - as Guest Star)