Elizabeth Gillies and Milo Manheim have officially started ... the actress had a fun reunion with her Victorious co-stars Avan Jogia and Daniella Monet. Life is about to change in a big way ...

Deadline announced the spinoff is in development under the working title 'Hollywood Arts' Maybe it's time for Elizabeth "Liz" ...

Maybe it's time for Elizabeth "Liz" Gillies' iconic Jade West character ... know they were coming," she says of her former costars. "Avan texted me that day and said, 'Hi, love.

Related: How Liz Gillies and Milo Manheim Bonded as Ex Child Actors While Costarring in Little Shop of Horrors (Exclusive) Jesse Grant/WireImage Ariana Grande, Daniella Monet, Avan Jogia, Victoria ...