The friendship of these two former best friends is on the rocks right now.
They are both B list. Both actresses although one started off as something else.
The one who started off as something else was horrified to learn that her best friend used to sleep with this permanent A list mostly movie actor who is an Academy Award winner/nominee throughout his marriage.
Even though the marriage ended a long time ago the affair revelation was recent.
Actress who started out as something else: Minka Kelly (model)
Actor: Sean Penn