The major members of the family are Eric Forrester ( played by John McCook ) , the president of Forrester Creations , his wife Stephanie ( Susan Flannery ) , their eldest son Ridge ( Ronn Moss ) and Brooke Logan ( Katherine Kelly Lang ) , who was married to both the father and the son . The program features an ensemble cast , headed by its longest-serving actors Susan Flannery as Stephanie Forrester , John McCook as Eric Forrester , Katherine Kelly Lang as Brooke Logan , Ronn Moss as Ridge Forrester also known as the core four .