"Glee" losing five cast members next season

Some of McKinley High's classmates are graduating from "Glee."

Cast members Heather Morris (Brittany), Mark Salling (Puck), Harry Shum Jr. (Mike) and Amber Riley (Mercedes) won't be returning to the show as series regulars, according to TVLine.

Additionally, Dianna Agron (Quinn) is not slated to return, save for possible guest appearances.

Morris, Salling, Shum and Riley may also return to the show occasionally as guest stars.

The news shouldn't come as a surprise to fans of the series -- Morris' character got accepted to MIT at the end of last season and the others had previously graduated from McKinley but still dropped in occasionally.

"Glee" will return for its fifth season Sept. 19 on Fox.