Kevin James' wife Steffiana De La Cruz appears in four episodes and plays four different characters over the nine-year run of the show.
Angelo Pagán, who is married to Leah Remini, guest-starred on the show six times as five different characters over the nine season run.
Megan Mullally almost wound up in the role of Carrie. But she changed her mind and accepted a part on Will & Grace (1998).
Kevin James has portrayed his King of Queens character, Doug Heffernan, in episodes of three other CBS sitcoms: Everybody Loves Raymond (1996), Becker (1998), and Cosby (1996).
This was the last American live-action sitcom to have premiered in the 1990s to end its run.