Not sure about yawnworthy myself, but probably for different reasons to Jon.

Considering what aliens (who might not exist) have in the way of intelligence (which may not exist, or even more likely not exist in a way we recognise) may or may not believe in (which is again further to caveats) is, frankly, a perilous activity. But, ok, I'll be foolish and leap in.

Most alien life will be of a form that we do not recognise as reflective. I would hazard a guess that daffodils on Earth do not see a need to consider the existance of God, but their form of intillegence, if it exists, is so unrecognisably different to mine that the question approaches meaninglessness. So let's restrict ourselves to intelligence that is self-reflective, i.e. capable of asking the 'why am I here?/Has life a purpose?' questions with answers other than things like 'To serve my hive/society' . It seems to me most likely that asking those question necessarily preceed any formal approaches to answering them, which have examples such as 'science' and 'philosophy' in our world.   And the simplest answer without those is 'there must be something/someone in charge'. So, on the basis of no evidence and very little data I would speculate that any form of life which we would recognise as intelligent and self-reflective and has any sort of progression in its society would have believed in a god or gods at some stage.