django admin - how to override the default <select> view for foreign key?

Question

I have 2 django model

class Location
  address = models.CharField(max_length=100)
  city = models.CharField(max_length=20)

class Client
  location = models.ForeignKey(Location)
  name = models.CharField(max_length=100)

And I have the following admin.py

class ClientAdmin(admin.ModelAdmin):
fieldsets = [
    ('Client Details', {'fields': ['name']}),
    ('Location Details', {'fields': ['location']}),
]


admin.site.register(Client, ClientAdmin)

When I try to add a Client I like to have a editable "location" fields i.e. address and city text fields. django by default gives a list.. how can I get the fields from the foregin tables?

any way I can do this? I don't wish to register the Location table in the admin.

thanks