Introduced by Bradley Bell, she is currently portrayed by Jacqueline MacInnes Wood. Steffy and her twin sister Phoebe (MacKenzie Mauzy) were born onscreen as the daughters of supercouple Ridge Forrester (Ronn Moss, later Thorsten Kaye) and Taylor Hayes (Hunter Tylo, later Krista Allen) during the episode airing on September 21, 1999. For the character's first five-year period, she appeared as a minor.
Launched by Bradley Bell, she is currently portrayed by Jacqueline MacInnes Wood. Steffy and her twin sister Phoebe (MacKenzie Mauzy) were introduced onscreen as the daughters of supercouple Ridge Forrester (Ronn Moss, later Thorsten Kaye) and Taylor Hayes (Hunter Tylo, later Krista Allen) during the episode airing on September 21, 1999. For the character's early years, she made appearances in a limited capacity.