It's not just a classic - It's a timeless one! Katharine Hepburn (by her own accounts) was in two minds about playing screwball comedy. But she pulls off the characterization of the mad-cappest heroin/heiress ever portrayed on film. It's NOT Kate. It's Kate brilliantly breaking out of her 1930s typecast. The pace is fast, Cary Grant is brilliant as the professor Kate harasses/helps/falls in love with throughout. And what about Susan's aunt and the major? Priceless! Kudos to Baby, as well. I think maybe a few reviewers have been taking their humor from watching 1930s European comedies. Unless it's all out and out vaudeville or cabaret transpositions you're watching, I wouldn't recommend making those your standards for judging "Bringing Up Baby". Worse still if you're judging by American/European standards of the 21st Century. I'm not saying you're wrong, I'm just saying since you can't compare this to virtually anything of those, just enjoy the ride. The Acting you CAN compare, though. And I put my money & soul on Hepburn, Grant & Baby every time.