You will need to have a 4K rated HDMI cable though (if you don't already have one). 4K discs are region free but not necessarily the accompanying blu-ray.
Zavvi has a steelbook 4K (only $44.99 +$4.99 Shipping!)
"Over 90 minutes of behind-the scenes bonus extras including the stories of west side story & the songs" ...
Subtitle Languages:
4K: English HOH, Danish, Finnish, Italian, Norwegian...