Filmmaker Shirish Kunder has finally put an end to the ongoing animosity between him and superstar Shah Rukh Khan by tweeting a public apology.

The editor-turned-director, who is married to Shah Rukh's close friend and choreographer-director-and-now-actor Farah Khan, had created a stir last year when he took a potshot at the superstar's mega-budget venture RA.One on Twitter. "I just heard a 150 Cr firework fizzle," Kunder had tweeted.

However, Kunder has now apologised for the same in a tweet today, and says he regrets it."I'll always regret one thing that I feel very guilty about. I sincerely apologise for my tweet on RA.One," he tweeted.