These two actresses/former co-stars hate each other. One is a B list mostly television actress on a struggling network show. The other is a B+ list mostly television actress who goes from one hit project to the next. Apparently the B lister, who used to be an A lister is jealous of the B+ lister and used to treat her like crap. It also doesn't help that another former co-star who is always willing to stir up trouble and desperate for parts whispers things in each of their ears.
Sarah Michelle Gellar/Alyson Hannigan/Michelle Trachtenberg