called me from my sinful existence, regenerated my spiritually dead heart

I'm not trying to be picky, but I have a question:

Does God call us and then regenerate us, or is it the other way around? I was thinking He regenerates us and then calls us.

True godliness is a sincere feeling which loves God as Father as much as it fears and reverences Him as Lord, embraces His righteousness, and dreads offending Him worse than death~ Calvin