We spotted young Ron Reagan the other...

We spotted young Ron Reagan the other night at the Grammy Awards presentations behind the scenes in the press pool. And we noticed that the Gipper’s son is sporting a new haircut. It’s sort of a long flat-top, buzzed around the ears, and it looks a lot like the style that one of this year’s Grammy Award winners, 74-year-old pop talent scout John Hammond, has been wearing forever. Hammond, who signed everyone from Count Basie to Bruce Springsteen in his time, received the President’s Merit Award during the show. The younger Reagan was there to cover it for “Good Morning America.”

She looks pretty in green too. That’s the color Molly Ringwald chose when she went “shopping” recently at American Rag Cie, the smartly decorated secondhand store on La Brea Avenue. Life magazine selected the locale, store manager Tamara Nichols tells Listen, and Ringwald selected the dress so she could look pretty as a picture in the current issue. Her get-up included a $39 prom dress (circa 1950), a $29 pair of antique earrings and a $12 pair of brand-new, long satin evening gloves. All dressed up with no escort, Ringwald stoically posed with what Nichols describes as a store mannequin that has a cartoon wolf’s head. At least the wolf in vintage rags had the decency to wear a tuxedo for the occasion, and someone kindly threw in champagne glasses so the twosome could look as if they were having a grand old time.

If the new little brother on “Dynasty” seems to age before your eyes, it’s probably the gray hair. British actor Christopher Cazenove, who recently debuted as Ben Carrington, tells Listen that producers noticed he photographed “slightly young” for the role of the disgruntled and scheming sibling of John Forsythe. Makeup artists dabbed gray on his temples and sideburns, but “after each scene, the paint got put on slightly different,” Cazenove says. So after three episodes, the 40-year-old actor chose a more lasting solution: gray dye to the temples and sideburns. Now Cazenove, whose credits include Masterpiece Theater productions and the feature “Eye of the Needle,” may have more predictable hair color--but he still skirts the issue of Ben Carrington’s age: “I don’t really know,” he says. “It all depends on how old you think John Forsythe is.” And we dare not venture a guess.

Barbara Rush has taken up knitting “to keep her busy while she’s touring,” we hear from Los Angeles sweater designer Judy Graham of Topaz. But that’s not to say Rush has switched to wearing homemade creations. She summoned Graham to her home recently and selected close to a dozen new Topaz styles, including a multicolored patchwork cardigan, Graham tells Listen. Rush often shops for Topaz sweaters from her own living room since a mutual friend, “who’s not famous,” introduced them, Graham says. Other Graham fans can find her designs at So Much and Co. on Sunset Boulevard and Regine on Melrose Avenue, she says.

Hold the black tie, please. May Co. is forgoing the usual formal gala to celebrate its new downtown store. Instead, it will underwrite a 10-K walkathon for charity. The March 16 event benefits the Downtown Women’s Center’s future residence for homeless women. The 9 a.m. walk starts at May Co.’s new headquarters at 7th and Figueroa streets. Applications are at May Co. stores and registration is $5 per person. For additional funds, entrants are urged to get sponsors for each kilometer walked. So wear your sneakers and something comfy. You can’t walk 6.2 miles in a tux or formal gown.

‘The mustache is the main reason I took the part,” claims actor Marshall Colt, who is about to appear in a TV movie, “Beverly Hills Madam,” looking like a mustachioed San Francisco scion. That’s a far cry from the character Colt played in his most recent picture, “Jagged Edge,” with his slicked-back hair and earring. “I wanted a chance to play someone who looks totally opposite from the last role I played,” Colt explains.

Nolan Miller,designer for prime time’s glitziest women, will have three fewer outfits to concoct this spring for “Dynasty.” Miller sponsored a contest for students at the Fashion Institute of Design and Merchandising, and the winning entries will be seen on the show. Miller tells Listen that he chose 25 finalists from sketched entries, and then “Dynasty’s” leading ladies determined the winners. Students Lourdes Chavez, Barbara Jax and Michael Lew won, and their creations--a yellow wool dress and black jacket for Krystle, a taupe jersey dinner dress for Dominique and a black satin evening gown and fur-trimmed coat for Alexis--will be worn in coming episodes. Miller recalls that as a student at the former Chouinard Art Institute, he entered a similar studio-sponsored costume contest. Miller lost to a classmate. “I overdesigned,” he admits.

Exercise fiends, who sometimes wonder what it’s all for, might find the answer imprinted on a new leotard designed by Gilda Marx for her Body collection. It’s a basic, tank-style suit dripping with chocolate-covered cherries, kisses and fudge-y little cakes, all pictured on the front. Marx says the suit was inspired by a survey she read, claiming that Americans each ate an average of 12 pounds of candy in 1985, and 60% of it was chocolate. Marx, who also owns fitness studios and teaches classes, adds: “It’s OK to eat candy as long as you work it off.” Marx’s “Chocolate” leotard, and a matching T-shirt, are in department stores now.