How to start a thread to update network data in tkinter when window opens without using a button

Question

The following code updates a label with the price of BTCUSDT downloaded from the Binance public API. The thread is started with a button, but I can't work out how to start it without the button, when the window opens.

from tkinter import *
import time
import requests      
import threading

def get_price():
    while True:
        root_url = 'https://api.binance.com/api/v3/avgPrice'
        symbol = 'BTCUSDT'
        url = root_url + '?symbol=' + symbol
        data = requests.get(url).json()
        my_label.config(text=data['price'])
        time.sleep(60)
        

root = Tk()
root.geometry('400x200')

my_label = Label(root, text='Hello There')
my_label.pack(pady=20)

my_button = Button(root, text='Start', command=lambda:threading.Thread(target=get_price).start())
my_button.pack(pady=20)

root.mainloop()