Python : Running function in thread does not modify current_thread()

I'm currently trying to figure out how threads work in python.

I have the following code:

def func1(arg1, arg2):

    print current_thread()
    ....

class class1:

    def __init__():
        ....

    def func_call():
        print current_thread()
        t1 = threading.Thread(func1(arg1, arg2))
        t1.start()
        t1.join()

What I noticed is that both prints output the same thing. Why is the thread not changing?