Twenty years may sound like a drop in the bucket to some major corporation that's been around for 100 years or so - but it's a landmark occasion for a theater company, especially in Salt Lake.

The Salt Lake Acting Company is pulling all the stops for its 20th anniversary wingding - a gala, black-tie affair on Saturday, Oct. 27, at the Marriott Hotel.There'll be a number of celebrity performers on hand to help congratulate SLAC's Producing Artistic Director Edward J. Gryska along with SLAC's board of trustees and staff.

The company's longtime patrons and supporters will be congratulated, too (after all, they're the ones who made it all happen).

Celebrities attending the gala will include five actors - Oscar-winner Haing Ngor (best supporting actor for "The Killing Fields"), Jack Ong, Utah native Gedde Watanabe, Eddie Cobb and James Dybas.

Cobb and Dybas, who costarred in SLAC's 1989-90 season opener, "La Cage aux Folles," will be featured in scenes from that production, one of the company's most successful. The evening will also include a 20th Anniversary Revue conceived and directed by Gryska and Ron Van Woerden, with performances by Alan Brodine, Toni Byrd, Mark Chambers, Teri Cowan, Annie Draper, Calvin Johnson, Becki Mecham, Betsy Natel and Joe Pitti.

The revue will include a 1970-80 medley (the Eliot Hall-Glass Factory years), and a 1981-90 medley (the Marmalade Hill years), concluding with "La Cage aux Folles Revisited."

The party will begin with dinner at 6:30 p.m., followed by dancing and entertainment.

The public is invited. Tickets are $50 per person. C. Frances Gillmor is chairing the event. For further information or reservations, call 363-0526.