Serving as host of the Academy Awards can be one of Hollywood's toughest gigs.

The actor, comedian, talk show host or performer typically chosen must balance a fine line.

One must be charming, witty and entertaining for the millions watching at home. At the same time, one shouldn't tick off the sea of famous faces and powerful industry moguls sitting directly in front of him or her.

Naturally, there have been good, bad and just plain awkward emcees. Even TV-ratings powerhouses and performers with major fan bases have crumbled under the pressure.

In the attached gallery, check out some of the memorable Academy Awards hosts over the years.