Elmo's X account posted antisemitic and racist posts after it was hacked on Sunday, a spokesperson for the makers of "Sesame Street" said in a statement.

After the beloved character’s X account was hacked, Jon Stewart decided to have some fun with a look-alike puppet of Elmo on “The Daily Show ” on Monday. The talk show host reminded the audience with a photo that he had worked with the famed muppet years ago and said he was “shocked” by the tweets.

xAI wrote that the post praising Hitler and sharing other antisemitic rhetoric was an "unacceptable error from an earlier model iteration, swiftly deleted," and condemned "Nazism and Hitler unequivocally," writing that Hitler's actions were "genocidal terrors."