Lakin and Keanan shared a photo with their TV father on Instagram on Dec. 31, with Duffy, who played Frank Lambert, sitting in between his two TV daughters. In the series, Lakin played Lambert's ...

Lakin was 12 when she was ultimately cast on the show as the tomboy in the family, Alicia "Al" Lambert Patrick Duffy and Suzanne Somers starred as the two parents, who blended their families, Brady ...

Step by Step stars Patrick Duffy, Staci Keanan, and Christine Lakin, who all starred in the hit sitcom as part of the blended family at the center of the show, reunited almost 28 years after the show ...