Align movie clip to center of the stage

Problem
Need align movie clip to center of the stage

Solution
Using stageWidth and stageHeight

Detailed explanation

my_mc.x=stage.stageWidth/2-my_mc.width/2;

my_mc.y=stage.stageHeight/2-my_mc.height/2;


Source:
align_mc_to_center_of_the_stage