Looks like we'll be seeing more of Priscilla Barnes, who plays blond bombshell Terri Alden on ABC's Three's Company—much more, in fact, than Barnes would like. Penthouse publisher Bob Guccione reveals he will reprint photos of Barnes in the buff, taken in 1976 when the then struggling actress wanted some exposure. Using the name Joann Witty, Barnes was the Penthouse Pet in March of that year. Guccione claims that Barnes has offered him an undisclosed sum not to run the photos, but he plans to print them anyway sometime in the "near future." Meanwhile, Priscilla, who suffered a similar embarrassment a few years ago when another skin magazine, High Society, published outtakes of her topless scenes in the R-rated flick Delta Fox, is pursuing a more modest form of moonlighting: This week she's opening a Beverly Hills boutique, Helen Ware, named after her partner, which specializes in Tiffany lamps priced up to $1 million.

New York City Ballet choreographer Jerome Robbins reportedly has declined an offer to replace Mikhail Baryshnikov as the artistic director of the American Ballet Theatre. Word is that Misha will leave his post next spring. Baryshnikov had offered to resign earlier this year. At the time, the board of the financially troubled troupe rejected that notion because, without Misha, the company couldn't have obtained the $2-million bank loan it has since received to finance another season. Other possible contenders for Baryshnikov's job include former ABT dancers Erik Bruhn, artistic director of the National Ballet of Canada, and Ivan Nagy, who directs a ballet company in Santiago, Chile.

Barbra Streisand exercises no ill will toward ex-steady Jon Peters in an upcoming interview with Geraldo Rivera on ABC's 20/20. "We had a lot of fun," says Streisand. "Jon protected me a lot. He kept me insulated. I got to the point where I needed to protect myself." Off-camera, Rivera divulges, "She dreams [at age 41] of having another baby and regrets being so much into her career." As for her love life, Geraldo says, "She dates Pierre Trudeau. I'm going to fix her up with someone I have in mind." Check future listings for details.

How those Little Girls on the Prairie have grown up. Melissa Gilbert, 19, who played Little House's Laura Ingalls, is now in Europe sightseeing and buying clothes for an upcoming national tour to promote her two new TV movies, Choices of the Heart (the story of American missionary Jean Donovan, who was slain in El Salvador) and Gladiola Girls, co-starring Stephanie Powers and Maureen Stapleton. The purchases from Melissa's first day of shopping in Milan include a Valentino sweater, Maud Frizon shoes and a Giorgio Armani black satin dress. Says Gilbert, "I wish fashion magazines would ask me to model."...

Disrobing is closer to Melissa Sue Anderson's style in the CBS movie First Affair, to air Oct. 25. Melissa Sue, 20, who played Mary Ingalls on Little House, only bares her shoulders during an on-camera tryst with co-star Joel Higgins, but the scene was so steamy, she claims, that "the director thought it wouldn't pass the censors." It did, barely. Melissa Sue, who declined Brooke Shields' role in The Blue Lagoon because of the nude scenes, is wavering a bit on showing all. She now says, "I don't mind nude scenes, if they're tastefully done." But in her next film, Chattanooga Choo Choo, starring Barbara Eden and Joe Namath, she'll keep her clothes on.