Michele, 25, who plays Rachel Berry on the TV series, will no longer be playing a leading part in the series as her character will be graduating from high school, reported Contactmusic.
"It's impossible to say how much Glee means to me. This year has been so amazing and I cannot WAIT for next year. It's going to be great... I'm so grateful for our amazing crew and most of all to all of YOU! To all of our gleeks out there you all helped make our show what it is.
"I love you all with all my heart! Can't wait to have an amazing summer and see whats next for Rachel Berry in season 4!!!!(sic)," she posted on Twitter.