Kathy Hilton looks half her age in sultry black minidress while celebrating 46th wedding anniversary

Kathy Hilton flaunted her legs in a black minidress while celebrating her 46th wedding anniversary with her husband, Rick Hilton.

The “Real Housewives of Beverly Hills” star, 66, looked ageless in the plunging lace dress in a sweet photo shared via Instagram Monday.

She accessorized with black heels and a gold-colored purse.

Kathy posed with one arm on her waist, while Rick, 70, wrapped his arm around her.

The businessman sported a classic white suit, black shirt and black shoes for the special occasion.

“Happy Anniversary to my forever date ❤️❤️❤️ @rickhilton7 #loml,” she captioned the photo.

Kathy also honored her and Rick’s anniversary with a throwback video from their 20th wedding anniversary.

The clip showed the Chairman of Hilton & Hyland giving a toast, recalling when they met as teenagers and when they got married in November 1979.

Rick compared Kathy to the “I Love Lucy” actress Lucille Ball, complementing his wife’s “great sense of humor.”

“I knew she was absolutely knockout gorgeous and also that she was very bright,” he added, recalling when they got engaged.

“But myself, not being an idiot about it, I said, ‘You know, this is a catch and I’d better close this deal,’” Rick continued.

“Looking back over the last 20 years, I must say that, not only are you funny like Lucille Ball, gorgeous beyond belief and smarter than most people I’ve ever met, but you’ve been just a fantastic wife.”

Rick also referred to Kathy as “a great mother” to their children — Paris, 44, Nicky, 42, Barron, 36, and Conrad, 31 — and a “great lover” to him.

Last year, the reality star credited her long-lasting marriage to Rick to “respect” and “honesty” while chatting with Page Six at her annual Christmas Party.

“And if you’re upset about something, you talk about it right away,” she added.