Which Hollywood power couple announced that they were separating on January 7, 2005?

The reason, apparently, was the co-star of Mr.Pitt, Angelina Jolie. Pitt and Jolie became a couple a month after he and Aniston had filed for divorce, although the three parties objected to any extra-marital fraud. The divorce of Aniston and Pitt was completed in October 2005. Three months later Jolie was pregnant.