Playing themselves in Season 4 (which aired in 2010), Ivanka Trump and Jared Kushner hosted a New York Observer party (which Kushner owned – probably the reason for their appearance) and they greeted Lily and Rufus at the door. 

The episode "Easy J" aired on the first wedding anniversary for the couple who now share three children together.

Reflecting in September 2017 on the couple's cameo appearance, Gossip Girl co-creator Josh Schwartz told Vulture "It would've been, 'They're on a list and they're in town – reach out and see if they're available. People wanted to be on the show. It was a crazy thing."

"They are socialites in New York and they do fit the world of Gossip Girl," EP Joshua Safran added.

"I'm sure Lily van der Woodsen knows Trump and would have been on the board of charities with him or Melania. That's the world of Gossip Girl, so to deny it would be wrong."