It seems that Julia Roberts, Daniel Craig, Hugh Grant, and Liam Neeson have been keeping a major secret from the public for their entire careers. In a hilarious exposé that aired as part of Thursday's Red Nose Day special on NBC, some of Hollywood's biggest stars came clean about what their voices really sound like. "Julia is incredible to work with and there's no doubt that she's a brilliant actress, but, um, I've just been directing her . . ." Jodie Foster tells the camera about Julia. "And she has what I'd describe as a . . . distinctive voice? But it's not what I would associate with a Hollywood leading lady." The camera then cuts to Julia, who reveals an incredibly deep and manly voice. And while Julia's voice is shocking, it's not until some of Hollywood's biggest action stars start talking that the real surprise begins. Watch the hilarious clip above to see what we mean, then check out what all the British celebrities were forced to do during the Red Nose Day special.