Cook bacon until crispy, place on a paper towel lined plate to the side
Cook pasta until al dente, drain and add to the casserole dish.
Chop rotisserie chicken into bite size pieces, add to a gallon size Ziploc bag. Add in olive oil and ranch dressing mix. Toss to coat the chicken. Add chicken to the casserole dish.
Pour alfredo sauce over the chicken, stir to mix together with the pasta.
Top with mozzarella and cheddar cheese, and bacon pieces
Bake for 15 minutes until cheese is melted. Remove from oven and enjoy