Django one form / two models

I have a very simple model for tracking events:

class Event(models.Model):

    description = models.TextField()
    location = models.ForeignKey(Location)    
    start = models.TimeField()
    duration = models.IntegerField()
    event_date =开发者_StackOverflow社区 models.DateField()
    creator = models.ForeignKey(User)

and I opted to extract the location in a separate table in order to be able to perform queries:

class Location(models.Model):

    city = models.CharField(max_length=20)
    address = models.CharField(max_length=30).

What would be the best way to create a form for inserting/updating events, taking into account that the location should be done separately and than linked via ID in the event instance? I wanted to da maybe some autocomplete field for the location address and city, but to keep it on the same form for simplicity?

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Define your own widget for the ModelChoiceField in the ModelForm that is generated for the ForeignKey.