Would Al ions still be reducd to Al metal if it was aqueous soltion? To my knowledge, Aluminium is mostly mined in the form of Aluminium oxide or Al2O3 and then the Bayer process is used to extract and refine the pure Aluminium.

Now, The Al2O3 must be in a molten state when the process occurs. Why is that? Why must it be molten?

Also, Would the Al(3+) ions still be reduced to the Al metal if it was in an aqueous solution instead of being molten?

Thanks,
The Bayer process does not produce aluminium. It produces sodium aluminate, and finally aluminum oxide, which is later used in the Hall–Héroult process (without water) to produce aluminium metal.

As @Mithoron implied, aluminium will displace the hydrogen from water, so cannot be made in an aqueous environment.