Thinly slice the celery and combine it in a bowl with the chicken.
Blend together the mayonnaise, sour cream and rosemary.
Pour the dressing over the chicken and celery, stirring until the ingredients are thoroughly mixed.
Serve immediately or refrigerate for up to 24 hours.
Nutritional Information Per Serving:
242 calories; 5g fat; 95mg cholesterol; 200 mg sodium