The Academy-award-winning actress, 67, enjoys her profession to much to think about hanging her boots, the Daily Express reported.
"It is hard to let go of our business. Maybe I'll never retire. I can't see it happening because I love working too much. It is hard to let go of the creativity involved and the attention you get. You think it doesn't mean anything to you until suddenly you don't get any!," Mirren said.
The actress will join a stellar cast comprising John Malkovich, Catherine Zeta-Jones, Bruce Willis and Anthony Hopkins for the sequel to 2010 movie.