It seems Debbie Reynolds has been around since show biz was invented — not show business, but, you know, SHOW BIZ! The razzley-dazzley, tap-dancing kind of show biz.

From her first big break in movies, as demure Cathy Selden opposite Gene Kelly and Donald O’Connor in Singing in the Rain, Reynolds has been one of the happiest faces on screens large and small.

For one generation, she’s the Unsinkable Molly Brown and the spurned wife Eddie Fisher left behind for Elizabeth Taylor. For another generation, she’s a perennial guest star (“The Love Boat,” “Will and Grace”) and Las Vegas razzmatazzer. For still another, she’s the star of the children’s “Halloweentown” movies. Of course, some only know her as “Princess Leia’s mom,” which is to say, her daughter, Carrie Fisher, is nearly as famous as she is.

The 75-year-old Reynolds is still going strong, to put it mildly. She’ll be at San Francisco’s Herbst Theatre one night only Friday, Dec.7, at 8 p.m. Singing, dancing, joking and storytelling (or perhaps whe should say gossiping) will be on the Reynolds menu.

Tickets are $47.50 to $77.50. Call 415-392-4400 or visit www.cityboxoffice.com for information. The Herbst Theatre is in the San Francisco War Memorial and Performing Arts Center, 401 Van Ness Ave.

For information visit Reynolds’ official Web site at www.debbiereynolds.com. (And catch this, the home page plays “Tammy”!)