No route matches [POST] "/tv_series/new"

When i display the form, i type in some stuff then i want it to take to the index view

_form.html.erb

<%= simple_form_for @series, :url => { :action => :new } do |f| %>
  <%= f.input :title, label: "Series Title" %>
  <%= f.input :description %>
  <%= f.input :actor %>
  <%= f.button :submit %>
<% end %>

Can some one please help me indentify the error for me, i dont know why its not creating the tv series i try to create, when i check tvseries.connection, it says its nil, there isnt anything in.

tv_series_controller.rb

 class TvSeriesController < ApplicationController
      def index
      end
      def new
        @series = Series.new
      end
    def create
        @series = Series.new(serie_params)
        if @series.save
          redirect_to root_path
        else
          render 'new'
        end
      end
      private
          def show
          params.require(:series).permit(:title, :description,:actor)
        end
    end

newhtml.erb

<h1>New Serie</h1>

<%= render 'form' %>

routes.rb

Rails.application.routes.draw do
  resources :tv_series
  root 'tv_series#index'
end

_create_series.rb

class CreateSeries < ActiveRecord::Migration
  def change
    create_table :series do |t|
      t.string :title
      t.text :description
      t.string :actor
      t.timestamps null: false
    end
  end
end