Brad Pitt and fiancee Angelina Jolie are notorious for being tight-lipped about their private life, but leave it to our Senior Entertainment Reporter, Roz Weston, to get the most private Hollywood couple to open up on the black carpet!

Brad Pitt on the black carpet at the world premiere of “World War Z”;

Taking over London’s Leicester Square for the world premiere of Brad’s new film World War Z, the actor spoke candidly about the outpouring of support the couple have received after Angelina’s “brave”; decision to undergo a preventative double mastectomy earlier this year.

“I’m really moved by it,”; he said. “I was moved certainly by this time we’ve just gone through, it was emotional but life affirming.”; Continuing on, Brad elaborated: “It’s one of those things that remind you what’s important and brings us even tighter and to see the effect that… she went through on a micro-level and the choices she made – what that meant to people who were also wrestling with the same issue, that weren’t aware of the options that were out there… I get emotional even talking about it.”;

Even Angelina herself spoke about the effect her op-ed has garnered: “I’ve been very happy just to see the discussion about women’s health expanded. That means the world to me after losing my mom to these issues.  I’m very grateful for it and I’ve been very moved by the kindness and support from people.”;

Angelina’s stunning backless Saint Laurent gown, seen from the black carpet at the “World War Z”; premiere!

The 37-year-old award winning actress and mother-of-six was back in black, a custom Saint Laurent Paris gown to be exact, and posed with Brad and her sons Pax and Maddox inside the theatre.

And from one side of the “black carpet”; to another, Roz was the only Canadian who caught up with Brad twice! Scoring a second exclusive conversation on the carpet of the World War Z concert with headlining act, Muse.

Inquiring whether or not Brad would bust out some moves to the music, Roz found out that there is something that Brad Pitt won’t do.  “White guys don’t dance,”; Brad said. “White guys in their 40s don’t dance – shouldn’t dance!”; he clarified.  And just in case you thought there could be nothing better than a dancing Brad Pitt, the actor tried out his rock star alter ego, grabbing Roz’s mic to say a big Brad hello to the crowd!

Tune-in to ET Canada tonight for all the action from the World War Z black carpet in London!