The editor-turned-director, who's married to Shah Rukh's close friend, choreographer-director Farah Khan, had created a stir last year when he took to Twitter for a potshot on the superstar's mega-budget venture "RA.One".
"I just heard a 150 Cr firework fizzle," Kunder had tweeted.
However, Kunder has now apologised for a similar in a tweet Saturday and says he regrets it.
"I'll always regret something that I THINK very guilty about. I sincerely apologise for my tweet on 'RA.One'," he tweeted.
In January this year, Kunder and Shah Rukh were caught in a brawl at actor Sanjay Dutt's bash. However, the 2 called truce.
Recently, Shah Rukh also got photographs clicked with the aliens of Kunder's new directorial "Joker". This act sparked speculations that the actor helps in promoting the film.
"Where have you ever seen Shah Rukh Khan promoting the film? Has he come on any channel to advertise it? He just took one picture with the aliens. Please don't spread nonsense," she said.
"Joker", that is as a result of release Aug 31, stars Sonakshi Sinha and Akshay Kumar.
Even though Farah was not acutely aware of the tweet, she said she was happy with her husband because she feels it takes numerous courage to apologise.
"I haven't read the tweet at the moment. But I'M happy with my husband. It takes a large heart to apologise," she said.
