Gloria to In the House

Hope and Gloria's title characters visited Friends' Central Perk.

The Jeffersons' George Jefferson was the second All in the Family supporting character to spinoff onto his own show.

The Jeffersons family appeared on the final episode of Fresh Prince where they purchased the house from the Banks family.

In the House's Tiffany's boyfriend cheats on her with The Fresh Prince of Bel Air's Ashley. Also Carlton and In the House's Marion are friends