Kevin Bacon and Sean Penn in Mystic RiverMYSTIC RIVER

It's tempting to say that in Mystic River, Clint Eastwood's complex, heartbreaking adaptation of Dennis Lehane's terrific murder mystery, Sean Penn gives the most nuanced approximation of grief to be found anywhere in modern movies.

Uma Thurman in Kill Bill: Volume IKILL BILL: VOLUME I

Miramax's decision to release Quentin Tarantino's Kill Bill in two installments was probably smart, as it'll inevitably boost the film's collective box-office intake and doesn't require audiences to commit, all at once, to a three-and-a-half-hour homage to Japanese samurai flicks.

Jack Black in The School of RockSCHOOL OF ROCK

I've seen Sidney Poitier do it. I've seen Robin Williams do it. I've seen Kevin Kline, Michelle Pfeiffer, Edward James Olmos ... hell, I've seen Dame Maggie Smith do it. But I have never seen an actor playing The Inspirational Teacher connect with his students as believably, and oddly beautifully, as Jack Black does in The School of Rock.