Practica Usando GUI | Insertar Peliculas a una Lista

from Tkinter import *

root = Tk()
root.geometry("500x500")
root.title("Peliculas")

def fun():
    x = aux2.get()
    pelis.append(x)
    lol = OptionMenu(root, aux, *pelis).place(x=350, y=140)

et1 = Label(root, text = "Escribe el titulo de una pelicula").place(x=100,y=100)
et2 = Label(root, text = "Peliculas").place(x=350,y=100)
aux=StringVar()
aux.set("")
aux2=StringVar()
pelis = [""]
lol = OptionMenu(root,aux,*pelis).place(x=350,y=140)

c1 = Entry(root, textvariable =aux2).place(x=100,y=140)
b1 = Button(root, text = "Ingresar", command =fun).place(x=100, y=170)

root.mainloop()