Stir in the orzo pasta and toast lightly for about 1-2 minutes. If using white grape juice, add it now to deglaze the pan.
Pour in chicken broth along with lemon zest, salt, and pepper. Bring to a boil then reduce heat; cover and simmer for about 10-12 minutes until liquid is mostly absorbed.
Add shrimp to the skillet, cover again, and cook for another 3-5 minutes until shrimp are pink.
Remove from heat; stir in Parmesan cheese and heavy cream until combined. Finish with fresh lemon juice and parsley.