Kevin Lord Riley Buchanan

Father: Joe Riley

portrayed in his early years by Morgan K. Melis (1976–1982) and Chris Cunningham (1982); later portrayed as a child by Jonathan Brandis (1982) and Ryan Janis (1983–1990); portrayed by Matthew Vipond (1990–1991), Joey Thrower (1991–1992), Kirk Geiger (1992–1994), Jack Armstrong (1994–1995), Ken Kenitzer (1995), Kevin Stapleton (1996–1998), Timothy Gibbs (1998–2001) and Dan Gauthier (2003–2007, 2009–2010)

Joseph Francis Riley Buchanan

Father: Joe Riley

portrayed as a child by Ryan Morris (1980–1985) and John Paul Learn (1985–1990); later portrayed by Chris McKenna (1990–1993), Nathan Fillion (1994–1997, 2007), Don Jeffcoat (1997–2001), Jeremy Fonicello (1998, temporary), Bruce Michael Hall (2003–2004) and Tom Degnan (2010–2011)

Jessica Eugenia Buchanan

Father: Clint Buchanan

portrayed as a child by Janelle and Tamara DeMent (1986–1988), Alex and Brittany Smith (1988) and Eliza Clark (1990); later portrayed by Erin Torpey (1990–2003), Maggie Andersson (1998, temporary) and Bree Williamson (2003–2012); Deanna DeVestern portrayed a young Jessica and Nadine Jacobson portrayed Jessica in 2008 flashbacks.