Kim Kardashian and Kris Humphries
Kim Kardashian was reportedly angered by her Kris Humphries tweet about Bruce Jenner's announcement that she is transexual. Loic Venance/AFP/Getty Images, Jason Kempin/Getty Images for Sports Spectacular

US reality TV star Kim Kardashian is upset with former husband Kris Humphries for posting a mean tweet following Bruce Jenner's ABC interview with Diane Sawyer.

In the two-hour special, the 65-year-old former Olympic star confirmed she is undergoing gender reassignment treatments.

The NBA athlete said: "Man, I'm glad I got out when I did," after the show aired. He added the hashtag: "#Gottadoyou."

"Kim is heated and hates Kris," a source Hollywood Life. "Having him do that frustrates her to know end, but she isn't surprised because she thinks he is an idiot and that's what idiots do."

After Humphries received backlash on social media for his comments, he apologised for the post.

"I have and always will support Bruce hence #Gottadoyou. Now recognize I was too vague and sincerely apologize for the way this came across," he later tweeted.

In August 2011, the 34-year-old Keeping Up With the Kardashians star married Humphries after just six months of dating. But the couple parted ways after 72 days.

Meanwhile, Jenner revealed Kardashians' husband Kanye West helped her to accept her father's decision.

He said: "I can be married to the most beautiful woman in the world — and I am — I can have the most beautiful little daughter in world — I have that — but I'm nothing if I can't be me. If I can't be true to myself, they don't mean anything."