The 'Hardest' Thing He's Ever Had To Do: Avatar 2 Star Explains Why Underwater Work Was The 'Hardest' Thing He's Ever Had To Do

James Cameron's name is synonymous with stunning aesthetics 

and cutting-edge technology. The Avatar franchise is a prime example,

with the 2009 original film shattering records and introducing  

astonishing motion capture innovation. The sequel The Way of Water, 

which required the cast to film extensively underwater, is much anticipated. 

And Avatar actor Sam Worthington recently stated why it was the  

"most difficult" thing he'd ever had to accomplish. In the Avatar franchise,

Sam Worthington plays protagonist Jake Sully, who evolves into a full .