`Gravity` star George Clooney says he isn't concerned with the way his looks are changing with age.

The 52-year-old is proud his hair is going "grey", but he says he would never dye it, and said not being an "action star" means he doesn't ''worry'' about his image too much.

"Luckily it became obvious pretty early on that I was not destined to be an action star so I don't have to worry so much about how I look,` contactmusic.com quoted Clooney as saying.

"I hear all this talk about how grey I am getting but I can't imagine ever dying my hair. My dad had this full head of white hair and I think it looks pretty good,` he added.