Is it necessary to take SAT or ACT if I'm an undergraduate student?

<p>I'm in my first year and third semester majoring in Actuarial Science. Is it necessary to take SAT or ACT if I'm an undergraduate student? What are the subjects required for me to get transfered to UPenn? I'm from Malaysia doing American Degree Transfer Program which I'll be studying in my institute for 2 year and transfer out to States. What are the curricular activities that i should get involved in to increase my chances of getting in. Thanks in advance! ;)</p>