Of course you've seen it all before -- that's precisely the point. "Center Stage" is grand, juicy fun regardless, tapping as it does into some archetypal pleasure center. There must some toeshoe-shaped segment of the brain that can't help responding to the sight of willowy youngsters with perfect carriage striding purposefully toward Lincoln Center, leotards and big dreams tucked away in their knapsacks.

I surrendered to "Center Stage" in its first 10 minutes as I watched the flaxen-haired, pouty-cheeked Jody (Amanda Schull), giving her all during a crucial audition for a prestigious New York ballet academy. When she learns she has been admitted to the academy, which gives her a shot at getting into a major dance company, her parents -- whose sensible hairdos signal a well-meaning but annoying cluelessness -- remind her that dancing in a major company isn't everything and that she can always go to college. Boo! Hiss! Jody, wisely, throws a minitantrum, telling her folks that she needs to take a shot at her dream, whether she succeeds or not, and off she goes.

The minute she's let off at the curb of her dorm, she's greeted by none other than star dancer Cooper Nielsen (Ethan Stiefel), who's studly in a pixielike way. He gazes meltingly at young Jody, offering to help her with her bags. She refuses, but she's thrilled nonetheless. It turns out that Cooper has recently been jilted by his longtime girl, the principal ballerina at that ultraprestigious dance company, who has run off and married the company's director, Jonathan (Peter Gallagher). Cooper's a loose cannon in the love department. Will the innocent but frankly ambitious Jody have the means to resist him? And what role will terrific dancer and awfully nice guy Charlie (Sascha Radetsky) end up playing in her life?

In case that setup isn't scrumptious enough for you, there's more. Jody ends up having a tough time of it in the program, realizing that she's not nearly as good a dancer as some of her peers, including the snooty Maureen (Susan May Pratt) and the breezy, rebellious Eva (Zoe Saldana). Her teacher, persnickety Juliette (Donna Murphy), repeatedly tsk-tsks over her turnout with a pained expression. Things don't look good for our poor Jody. But if I tell you that a triumphal performance turns things around for her, I'm sure to get letters berating me for giving too much away, so I'll keep my mouth shut.

It doesn't really matter much, though, because the pleasure of Nicholas Hytner's movie is delivered in its details -- and, of course, in its dancing. There are people likely to mutter about how tragic it is that a director with Hytner's "credentials" -- he was a celebrated stage director in Great Britain before launching his motion-picture career with "The Madness of King George" in 1994 -- would stoop so low as to take on a mild-mannered genre picture like "Center Stage."

But "Center Stage" is actually a pretty rare entertainment: It's casual and sweet spirited, but you also get plenty of glimpses of intelligence at its core. Hytner and screenwriter Carol Heikkinen dip right into the world not just of young dancers but of young people, with a minimum of condescension.

You couldn't make a remotely realistic picture about young ballet dancers without addressing the issue of eating disorders, and if Hytner underscores the problem a little too heavily at times, his touch is delicate where it really counts. When the haughty Maureen finally agrees to go out with the young premed student who's smitten with her, we see her on a group bowling date with him and a bunch of his friends. Maureen is so focused on her dancing that she's socially very awkward; at first, she doesn't know how to react when one of the kids tells an off-color joke about a mouse and an elephant.

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