Victoria Justice plays Tori Vega Danielle Monet plays Trini Vega Elizabeth Gillies plays Jade West Avan Jogia plays Beck Oliver Leon Thomas plays Andre Harris Ariana … Grande plays Cat Valentine Matt Bennett plays Robbie Shappiro They are the cast of Victorious and there characters!11 people found this useful.he Victorious cast Victoria Justice-Tori Vega Ariana Grande-Cat Valintine Daniella Monet-Trina Vega Elizabeth Gillies-Jade West Avan Jogia-Beck Oliver Leon T … homas-Andre Harris Matt Bennett-Robbie Shappiro. + 59 others found this useful. Anthony Squally.