From 1999 to 2003, Steffy and Phoebe were portrayed by various sets of identical twin child actors. Cameryn McNabb took over the role in 2003. From January to March 2004, Jordan Mella played Steffy. In April 2004, both roles were recast with Keaton and Kylie Rae Tyndall, and Steffy was rapidly aged. Kylie portrayed the role of Steffy until April 2005, when the role was recast with Addison Hoover, whose twin sister Alex Hoover took over the role of Phoebe. The Hoover twins were downgraded to recurring status in November 2005, and eventually left the program. In June 2006, former "Guiding Light" actress MacKenzie Mauzy took over the role of Phoebe upon the character's return, while Steffy was written out of the series.