Django: How to get current user in admin forms?

Here is what i did recently for a Blog:

class BlogPostAdmin(admin.ModelAdmin):
    form = BlogPostForm

    def get_form(self, request, *args, **kwargs):
        form = super(BlogPostAdmin, self).get_form(request, *args, **kwargs)
        form.current_user = request.user
        return form

I can now access the current user in my forms.ModelForm by accessing self.current_user