The Brady Bunch made step-families cool way before the Kardashians did! The OG blended TV family consisted of Carol and her three daughters and Mike and his three sons, who married after their first marriages left them widowed.
Finn’s dad and Kurt’s mom both passed away on Glee, and so it was a happy occasion when the classmates’ parents married each other. The guys had a hard time adjusting as step-brothers at first but eventually made it work, and Kurt’s dad Burt was especially supportive to his wife, Finn’s mom, after Finn’s death in season 5.
One Tree Hill revolved around the complicated relationship of Nathan and Lucas, who share a father. And friends. And good looks. And so many more things.
The characters on Gossip Girl were literally one big happy family. Serena and Chuck became step-siblings after her mom married his dad, and then, when Lily assumed her husband was dead, married Dan’s dad, Rufus, who she clearly loved all along. Oh, and Blair had a step-dad, too.