I tried starting it today after 2 months and its not starting. The battery seems okay as the lights and radio come on. Does anyone know what could be the possible problem?

 

Got a warranty?

It might be loose battery cables (check both ends of both cables). Starter takes so much more power than everything else combined; that's why the other stuff can still appear to be OK.

Rap on the starter with a broom handle. If it starts, drive to the dealer & ask for a new starter under warranty.