Yes you can.
Windows 8 support was provided to Boot Camp in version 5, along with drivers for the Mac hardware.
Boot Camp 5 adds Windows 8 (64-bit) support. Use the Boot Camp Assistant and a USB drive to install the latest Boot Camp drivers for your computer. These new drivers support both Windows 7 (64-bit) and Windows 8 (64-bit). You should download the newest drivers available any time you install Windows.
Per the quote above, you can use the Boot Camp Assistant to partition your drive, then install Windows 8 from ISO or disc.
You can find the full guide to installing Windows through Boot Camp on Apple's Help site:
- Open Boot Camp Assistant from /Applications/Utilities/Boot Camp Assistant.app.
- Follow the instructions to partition your disk.
- Let it reboot using your install media.
- Install Windows normally.