Their roles have not been revealed as of yet.
Ringwald is known as one of the brat pack as she starred in the 1980’s hits “Pretty in Pink,” “Sixteen Candles” and “The Breakfast Club.”
Lewis will be seen alongside Ryan Phillippe in “Secrets and Lies,” the upcoming drama series on ABC.
Lewis and Ringwald join “Nashville’s”Aubrey Peeples, Stefanie Scott, Aurora Perrineau and Hayley Kiyoko on the cast.
“Jem and the Holograms” is produced by Chu, Jason Blum for Blumhouse Productions, Scooter Braun, Hasbro’s Brian Goldner, and Hasbro Studios’ Stephen Davis and Bennett Schneir.