ause ous ▁is ▁often ▁said ▁to ▁look ▁" green ", ▁suggesting ▁that ▁the ▁" Green ▁Room " ▁is ▁the ▁place ▁where ▁the ▁nerv ous ▁actors ▁wait . ▁ ▁According ▁to ▁one ▁theory , ▁long ▁before ▁modern ▁make up ▁was ▁invent ed ▁the ▁actors ▁had ▁to ▁apply ▁make up ▁before ▁a ▁show ▁and ▁allow ▁it ▁to ▁set ▁up ▁or ▁c ure ▁before ▁performing . ▁Until ▁the ▁make up ▁was ▁c ured , ▁it ▁was ▁green ▁and ▁people ▁were ▁ad vised ▁to ▁sit ▁quietly ▁in ▁the ▁green ▁room ▁until ▁such ▁time ▁as ▁the ▁make up ▁was ▁stable ▁enough ▁for ▁performing . ▁Un c ured ▁make up ▁is ▁gone , ▁but ▁the ▁green ▁room ▁lives ▁on . ▁ ▁In ▁Shakespeare an ▁theatre ▁actors ▁would ▁prepare ▁for ▁their ▁performances ▁in ▁a ▁room ▁filled ▁with ▁plants ▁and ▁shr ubs . ▁It ▁was ▁believed ▁that ▁the ▁mo ist ure ▁in ▁the ▁to pi ary ▁was ▁benef icial ▁to ▁the ▁actors ' ▁voices . ▁Thus ▁the ▁green ▁room ▁may ▁refer ▁to ▁the ▁green ▁plants ▁in ▁this ▁stage ▁prepar ation ▁area . ▁ ▁The ▁term ▁green ▁room ▁can ▁altern atively ▁be ▁trac ed ▁back ▁to ▁the ▁East ▁End ▁of ▁London , ▁England . ▁In ▁C ock ney ▁rh ym ing ▁sl ang , ▁gre eng age ▁is ▁stage , ▁therefore ▁gre eng age ▁room ▁is ▁stage ▁room ▁and ▁like ▁most ▁rh ym ing ▁sl ang ▁it ▁gets ▁short ened , ▁hence ▁green ' ▁room . ▁This ▁information ▁came ▁from ▁com ed ian ▁and ▁dan cer ▁Max ▁Wall . ▁Rh ym ing