The St. Irenaeus Cheerleading Squad is made up of students in grades 4 thru 8. St. I also has a Pep Squad for grades 1-3. The girls cheer at home games during football season and compete in cheer competitions in the spring. They also take part in the La Palma Days Parade in November.
Tryouts are held at the end of each school year for the upcoming school year.