Heat 2 tbsp olive oil in a large pan over medium-high heat.
Season the shrimp with salt and pepper and add to the pan. Cook the shrimp stirring occasionally until they are pink and opaque. About 3-4 minutes. Add the garlic and cook for an additional 30 seconds. Remove and set aside.
Melt 4 tbsp butter in the same pan over medium heat. Add the cream and simmer while stirring for 4-5 minutes until slightly thickened. Do not allow it to boil.
Whisk in the parmesan cheese stirring until thickened. Return the shrimp and garlic and mix well. Season with additional salt and pepper to taste.
Drain the pasta and toss with Alfredo sauce and shrimp. Transfer to serving dishes and sprinkle with parsley to garnish. Serve hot.