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Legendary entertainer Debbie Reynolds has been hospitalized due to an adverse reaction to medication.

A rep for the 80-year-old actress/singer/dancer said her hospitalization at Cedars Sinai Medical Center in Los Angeles forced to cancel all appearances and concert engagements for the next three months.

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The Singin' in the Rain and Will & Grace star -- who still maintains a busy live concert tour schedule -- recently auctioned off a majority of her vast Hollywood memorabilia & costume collection accumulated over the past 40 years.

She is scheduled to appear in the annual Tournament of Roses Parade on New Year's Day aboard the "Follow the Stars, Adopt a Pet" float, sponsored by the animal advocacy Pet Care Foundation.