The duo took the viral challenge together with pal Scott Fahrendor after being called out by Anne Hathaway.
“Hathaway, get this—this is a f–king real challenge”, Kristen says before dunking their faces in the ice bucket for 15 seconds and pouring themselves bucket of water.
“In good faith you must believe this was all done with dirty bath water. Please be considerate of California water conservation.”
Watch them below.