"Ally McBeal" star Courtney Thorne-Smith and her fiancé tied the knot in a top-secret $250,000 five-day wedding extravaganza on the Hawaiian island of Lanai.
     The couple invited 50 close friends and family to their lavish June 2 nuptials.
     But courtney - who played Georgia, the wife of Ally's ex-flame Billy on the hit series - didn't put a single "Ally" co-star on the guest list!
     The bride and groom, genetic scientist Andrew Conrad, "were determined to keep their wedding hush-hush," revealed a source close to them.
     "They deliberately threw all of Hollywood off track," searing everyone connected with the event to secrecy."
     "They even cooked up a cover story that they weren't really going to marry until fall!"
     "At one point Courtney quipped: 'We did it! People magazine thinks this wedding won't happen until October!'"
     Courtney, 32, and Andrew have been planning the nuptials since they got engaged last year - "and they spared no expense," said a TinselTown source.
     "They flew in 50 guests for a five-day vacation which included sightseeing, sailing trips, yoga classes and special dinners."
     Celebrity guests included "L.A. Law" star Harry Hamlin and his wife Lisa Rinna, "Melrose Place" stars Rob Estes and Josie Bissett, plus saxophonist Kenny G. But her "Ally" co-stars were conspicuously absent.
     "When Courtney quit 'Ally' this year, she cut all personal ties with the show," said an insider.
     Wedding guests stayed at the plush Manele Bay Hotel on Lanai and began arriving two days before the big event so everyone could relax.
     At 6 p.m. on June 2, they were transported by bus to a mountaintop garden for the 7 p.m. ceremony.
     Courtney wore an off-white satin antique gown and carried a bouquet of matching roses, while Andrew looked incredibly dapper in an Armani suit and blue shirt.
     A local minister performed the 20-minute nondenominational ceremony atop a cliff overlooking the ocean. The couple, who both tied the knot for the first time, wrote their own vows.
     With tears in her eyes, Courtney said, "I love Andrew more than anyone else in the world. I want to grow old with him."
     Afterward, a lavish champagne reception was held at the nearby Koele lodge.
     The wedding feast, personally planned by Courtney, featured coconut encrusted Hawaiian snapper, slices of seared ahi tuna and fancy Caesar salads, plus mango flan and wedding cake.
     The newlyweds, who live in Malibu, delayed their honeymoon due to hectic work schedules.
     Courtney is the new poster girl for Almay cosmetics - and "friends are buzzing that she may follow in the footsteps of her friends Lisa Rinna and Josie Bissett, who got married then got pregnant," said the insider.
     And the ecstatic groom told a pal: "We got married in paradise. We planned it all ourselves and had only the people closest to us in attendance."
     "It was exhausting. But I've never been happier!"