In a large mixing bowl, combine the shredded chicken, diced celery, halved grapes, and diced red onion.

In a separate bowl, whisk together the Greek yogurt, chopped dill, lemon juice, salt, and black pepper until smooth.

Pour the dressing over the chicken mixture and stir until everything is well coated.

Taste and adjust seasoning if necessary.

Chill in the refrigerator for at least 30 minutes before serving for best flavor.

Serve on a bed of greens, in a sandwich, or with crackers.