Yes, it's possible by submitting the Program/Term Change Form in myIllini, but it's not always in your best interest to do so.
In submitting the form, you are withdrawing your current application and forfeiting your admission to the university. Because the program change is treated as a new application and it is past our application deadline, you'll now be considered a late applicant. If you are denied or waitlisted from the new major, you will be denied from the university and won't be able to move back into your original major. If you've been awarded scholarships or invited to join an honors program in your current program, those awards may also be affected.
If you choose to attend UIUC under the major to which you have been admitted, you’ll be able to speak with your academic advisor about your educational goals during New Student Registration. You may have to meet certain coursework and GPA requirements before transferring to another program.