"Being an actress isn't as fun as it may seem," Bynes wrote in June. "If I don't love something anymore, I stop doing it. I don't love acting anymore, so I've stopped doing it."
She added, "I know 24 is a young age to retire ... I've never written the movies and tv shows I've been a part of. I've only acted like the characters the producers or directors wanted me to play."
Reflection is nothing new to the Southern California native. Last December, she'd told Cosmopolitan magazine, "I'm at that stage where I'm still young and maybe naive, but I'm figuring it out."
Bynes can next be seen in the high-school comedy Easy A, due to open Sept. 17.