Heat olive oil in a skillet over medium heat. Add diced chicken and taco seasoning, cooking until chicken is fully cooked and no longer pink, about 7-10 minutes.

In a large pot, combine cooked rice and black beans. Heat over low until warmed through, about 5 minutes.

In serving bowls, layer the rice and bean mixture, followed by the cooked chicken, corn, cherry tomatoes, lettuce, avocado, cheese, sour cream, and cilantro.