"The Insider" co-host Kevin Frazier caught up with Jack Black at the raucous 'Kung Fu Panda 2' premiere on Sunday, getting the comedian to reveal his "inside joke" with Angelina Jolie, involving the actress' kids. A bearded Brad Pitt in shades attended the premiere with Angelina who looked stunning in a gown by Michael Kors, and Jack told us about one of Angelina’s amazing dresses that she wound up giving away. "She had a lot of unbelievable maternity dresses and she sent us one," said Jack, who welcomed his second son, Thomas, with wife Tanya Haden on May 23, 2008. "In return I gave her - it doesn't sound like a good gift - but I gave her a "Brady Bunch" DVD box set as kind of an inside joke because she has six babies just like the 'Brady Bunch.'" Featuring the return of Jack as Po the Panda alongside the vocal talents of Angelina, Seth Rogen, Lucy Liu, David Cross, Jackie Chan and Dustin Hoffman, 'Kung Fu Panda 2' finds Po living his dream as the Dragon Warrior, protecting the Valley of Peace alongside his fellow kung fu masters, The Furious Five, when a new villain, Lord Shen (Gary Oldman), threatens to conquer China and destroy kung fu. Dustin Hoffman shared that even though his children are grown adults they aren't above being impressed by his new animated feature - with one catch. "They just don't want to go with me [to premieres] anymore," Dustin chuckled. "They'll see it on their own." The 3D 'Kung Fu Panda 2' opens May 26. Click the video to see Brad and Angelina ...