OK, IDK why anybody would even think this, but Jennifer Connelly DID NOT have a breast reduction! If yo look at her in this movie, even, she isn't that big. The only time she looks large, is when she is in a role where she has gained a little weight, because if you know anything about women, those things expand and contract as her dress size changes. If you are married, or just have a girlfriend that has been pregnant, you would she this dramatically. Sure they get bigger because of the milk thing, but allot of it is due to the extra fat that a woman gains.
My wife has a very large B-Size, but over the last 15 yrs I have known her, she has been on diets, and before that was pregnant with our daughter. They have been down to a 32D, up To a 36EE, now back down to a 38DDD.
The only actress that is confirmed for sure that had a breast reduction is the Punky Brewster girl.