How can I prefetch_related through the inverse one-to-one relationship, where the one-to-one relationships can be different?

Let's say I have a database with movies, books, and software, and they all inherit the same element model.

class Item(models.Model):
    ...

class Movie(models.Model):
    item = models.OneToOneField(Item)
    ...

class Book(models.Model):
    item = models.OneToOneField(Item)
    ...

class Software(models.Model):
    item = models.OneToOneField(Item)
    ...

Now I want to query the database on the Item, but I want to pick a related object for this item, whether it be Movie, Book or Software. If all the objects were of the same type, say, films, then I could do the following:

Item.objects.prefetch_related('movie')

However, I need to be able to get the associated object no matter what type it is. Can i run:

Item.objects.prefetch_related('movie', 'book', 'software')

Will it find a related object no matter what type it is, and will it be effective? Is there a better way to do this?