gotcha

gotcha ガｧﾁｬ　わかった＝I got you/I have got you

got

Who (do you think) is the greatest actor in the world (ever)?
It's got to be..... 「（口語）...に決まってるよ/...に違いない」
It must to be.../It has to be.../It's got to be...(It has got to be...)
I'd say it's
I think it might be