Al Gore was a good sport at the Oscars tonight. First, Ellen DeGeneres was talking about people in the audience and mentioned that they had nominee Jennifer Hudson, who'd been on American Idol. America had not voted for her and here she was. Then she pointed out that America had voted for Al Gore and he was there too. Funny ol' thing, life...

Think Progress has the video of "the announcement" as well as the transcript.

DICAPRIO: So, Mr. Gore, we’ve got a big crowd out here tonight and an even bigger one at home. Is there anything you might want to announce?

GORE: I’m just here for the movies.

(...)DICAPRIO: Now, are you sure, are you positive that all this hard work hasn’t inspired you to make any other kind of major, major announcement to the world here tonight?

GORE: Well, I do appreciate that, Leo. And i’m kind of surpised at the feelings welling up here actually. You’ve been very convincing. Even though I honestly had not planned on doing this, I guess with a billion people watching, it’s as good as time as any.

Go watch the video to see how it ends!