This B-/C+ list mostly movie actress from a hit franchise gave up her first class seat on an overseas flight and sat in a middle seat in coach so a woman who was 8 months pregnant would not have to sit in the seat. Our actress had started talking to the woman before the flight and discovered the situation and after trying to get the woman a better seat, just gave up her own.
Source:
http://www.crazydaysandnights.net/2013/06/blind-item-kindness.html