I've made it and it acually is Olive Gardens recipe. Yummy. I also add strips of chicken that I've grilled in a pan with olive oil.
8 ounces Cream cheese -- cut in bits
3/4 cup Parmesan cheese -- grated
1/2 cup Butter or margarine
1/2 cup Milk
8 ounces Fettuccine; cook -- drain
In large saucepan combine cream cheese, Parmesan, butter and
milk, stirring constantly until smooth. Toss pasta lightly with
sauce, coating well. Leftovers freeze well.