Hayley Kiyoko is an American actress, singer and songwriter best known for playing Velma Dinkley in Scooby-Doo! The Mystery Begins and Scooby-Doo! Curse of the Lake Monster, as well as Stella Yamada in the Disney Channel film Lemonade Mouth.
She also has a starring role as Raven Ramirez, a black-hat hacker turned FBI analyst as part of Ryan's "hack-for-good" program, in the CBS crime procedural series CSI: Cyber.
Kiyoko's television credits include The Vampire Diaries and The Fosters. Her feature film credits include Insidious: Chapter 3 and Jem and the Holograms.
Kiyoko is also a songwriter and musician. She released her debut EP, A Belle to Remember, in 2013.