Stephen Hawking has set the cat among the pigeons by theorising in his new book that 'God' was not necessary and that the Universe would have created itself anyway. He doesn't actually say that 'God' doesn't exist but no doubt religious types will interpret it that way. Expect a fatwah any day now from either or both The Ayatollah or The Pope.
Notwithstanding that the concept of 'God' gives the Universe (and humanity in particular) purpose beyond itself, God by definition can't have been created by someone or something else. So, either 'God' created himself and the Universe from nothing or the Universe created itself from nothing. Either belief seems paradoxical to me; I suspect nothing was created.