If you have a wallet that support that fork, than yes, you will have the new BTC in your wallet( There might be also tutorials to how extract it from your wallet). But you have to know that the forked coins won't have the same value of the original BTC, and they could lose their potential soon.
Chances are that most wallets do not support the forks though. You need to do some research to find which ones will work and which ones won't and then transfer over your Bitcoins before October 25th or even 24 or 48 hours before, to be safe and get your free money.