Rob Kardashian tweeted and then deleted a post about spending Fourth of July with his "son" -- but there's an explanation Credit: Steven Lawton/

A Rob Kardashian mini-me? Not so fast. Followers were baffled when Kardashian, 27, tweeted on Thursday, July 3, about spending the Fourth of July holiday with his "son"—but it turns out it was all a joke.

"Happy I got my son with me for the 4th tomorrow!!" the tweet read. "Can't wait to watch fireworks with my little man! Hope everyone is safe!"

Fans immediately responded with shock and confusion, tweeting, "What? You have a son?" He let the speculation go on for a few hours before deleting the post and revealing his prank.

"Those who know me know I play and I do NOT have a son," The Arthur George sock designer and Keeping Up With the Kardashians star wrote. "Y'all got my mama emailing me asking if I have a son lol goodness hahaha. GOODnight."

A source tells Us Weekly the "son" joke is an ongoing one. "He always jokes he has a son," the insider says. "He loves when people believe him."