High rollers will now be able to use newly designed one hundred dollar bills -- which will go into circulation October 8.

Currency is primarily redesigned to stay ahead of counterfeiting threats, with the last $100 note redesigned for circulation in March, 1996.

Anti-counterfeiting features include a blue three-dimensional security ribbon and alternating images of bells and the number 100 that move and change as the viewing angle is tilted.

A bell image inside a picture of an inkwell changes from copper to green.

The old bills will still work -- but as they make their way through the banking system, they will eventually be returned to the Fed, where they will be destroyed.