Fetterman joins gubernatorial candidate Josh Shapiro at the event, which will kick off at 5:45 p.m. at Old Main.
The two-hour "Rally in the Valley" event will begin at 5:45 p.m. on Old Main Lawn.
Bram Woolley is facing misdemeanor charges for allegedly ignoring multiple orders from police officers to leave the area during Monday night's protest.
Far-right activist Jack Posobiec will join Mastriano at the rally.
Students will now receive a non-transferable wristband which they will be required to show to enter the student section.
Penn State police said it recommended Monday night's controversial event to be canceled as violence escalated.