Probably no one expects any great surprises from Donna Rice's exclusive interview with Barbara Walters on "20/20" tonight. In the interview, excerpts of which were released yesterday, Rice denies saying that former Democratic front-runner Gary Hart promised to divorce his wife Lee Hart and marry her. The National Enquirer recently quoted Rice as saying just that, and adding, "I'm going to be first lady."

According to the excerpts, Rice's comment is, "Pretty absurd, isn't it?"

Ford's Miami Twosome Hot young actor Michael J. Fox won't be the host of this Sunday's "A Festival at Ford's" as was promised, but steamy "Miami Vice" star Don Johnson will be there. Johnson will cohost with Bea Arthur of "The Golden Girls," which, like Johnson's show, has a Miami location. Now that's a couple, especially considering the fact that the gala cohosts in 1985 were John Forsythe and Linda Evans.

The other entertainers at the black-tie evening, which President Reagan and his wife Nancy are expected to attend, include country music star Glen Campbell, band leader Cab Calloway, American Ballet Theatre Artistic Director Mikhail Baryshnikov, magician David Copperfield and singers Art Garfunkel and Maureen McGovern. Out and About

This was to be a big week for Armand Hammer, the chairman of Occidental Petroleum Corp. and energetic man-about-the-world. He was to be at the White House today to receive one of the National Medal for the Arts awards for his efforts as a patron of the arts, taking part in all the accompanying social events as well as being part of the Ford's Theatre gala weekend. But on Monday, Hammer slipped and fell in his bathtub and fractured a rib. Under doctor's orders, he will spend the week in bed ...

That was Steve and Eydie two nights in a row eating hard-shell crabs at the Fishery on Connecticut Avenue. Singers Steve Lawrence and Eydie Gorme, who had performed Sunday at the Kennedy Center, were at the restaurant Monday and Tuesday night. Their son David was with them on Tuesday, and Steve explained to him that he was stationed in Washington while he was in the Army and lived at the nearby Albemarle Apartments ...

His million-dollar offer notwithstanding, Michael Jackson is not going to be able to buy the remains of Britain's "Elephant Man," the grotesquely deformed John Merrick, who died in 1890 and was the subject of a play and a movie. The London Hospital Medical College had turned down a previous offer from Jackson a few months ago, and yesterday it rejected his $1 million offer. Jackson's agent said the singer was fascinated by the technical, medical and historical significance of the remains. Merrick, when he was alive, was for a time exhibited at traveling fairs ... And a Columbia Records band called Full Force, which backed pop star Lisa Velez on her album "Spanish Fly," reportedly has bid $1.5 million for the remains, according to a spokeswoman for the group, who didn't know why Velez of Lisa Lisa and Cult Jam wants poor Merrick's bones or what she would do with them. The spokeswoman said yesterday that this is not a publicity gimmick, that Velez "is interested in unusual and different items." One wonders just what the group would do if the medical college accepted the offer ...

More than 2,000 fans and friends in a standing-room-only audience jammed the Neil Simon Theater on Broadway yesterday for a final tribute to Oscar- and Emmy-winning actress Geraldine Page, who died shortly after giving her final performance in that theater last week. The 62-year-old actress had been appearing there in Noel Coward's "Blithe Spirit." She was found dead of a heart attack in her home Saturday. Among her fellow actors at the ceremony were her former husband, Rip Torn, Oscar winner F. Murray Abraham and James Earl Jones, Cicely Tyson and Amanda Plummer ...

French film star Brigitte Bardot knows just what to do with the gifts of former husbands or lovers -- auction them off. The 52-year-old former sex kitten, who doesn't make movies anymore and is rarely seen in public, auctioned off mementos yesterday for a total of $580,000 to benefit her animal protection foundation. On the block in Paris were three engagement rings and the wedding gown she wore when she married filmmaker Roger Vadim in 1952. In addition, there was a ring that was a gift from her second husband, German playboy Gu nter Sachs. If Elizabeth Taylor ever decides to do the same thing with her jewelry and gifts from former husbands and lovers, she could probably help pay off the national debt ...