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The third time wasn't a charm for Christie Brinkley. The fourth go-round apparently didn't do her any favors, either.

The former supermodel and architect husband Peter Cook have announced plans to split after 10 years together. It's Brinkley's fourth failed marriage.

The news was confirmed Wednesday by her publicist, Elliot Mintz.

"Her immediate concern is for her children, and she's hoping during this difficult time that people will be kind enough to respect her privacy," he said in a statement.

The 52-year-old CoverGirl spokesmodel had one child with Cook, eight-year-old daughter Sailor Lee. Her soon-to-be ex hubby also adopted Brinkley's son, Jack, now 11, when the duo first tied the knot in September 1996. The boy's biological father is Brinkley's third husband, developer Richard Taubman.

Brinkley also has another child, 20-year-old daughter Alexa, with ex-husband Billy Joel.

Brinkley and Cook, 47, have spent the last decade in their Hamptons home, designed by Cook himself. No word on how the duo will split their considerable assets.

Brinkely has had a prolific, if not entirely successful, romantic history.

Her first trip down the aisle was with French artist Jean Francois Allaux and lasted from 1973 to 1981. Her marriage to Joel lasted slightly longer; she served as the muse for his hit song "Uptown Girl" and Brinkley returned the favor by painting the cover of his 1994 album, River of Dreams.

The professional poser tied the knot with Taubman in 1994, nine months after the real-estate mogul and model survived a near-fatal helicopter crash. The union didn't last long: Brinkley filed for divorce in 1995, just two months after the birth of their son.

She's not taking any time to feel sorry for herself.

Brinkley signed a multiyear deal in 2005 to return as the face of CoverGirl, this time for their Advanced Radiance line for more mature women. She previously served as the makeup line's face from 1976 to 1996, believed to be the longest running cosmetics contract ever signed by a model.