According to Us Weekly, she plans to walk down the aisle in summer next year.
"They're leaning toward a June event in the Hamptons," a source said, reported Aceshowbiz.
However, a second insider suggested the date might not be final because the 29-year-old actress turned designer and her beau who have been engaged for a year now "changed their plans a million times."
The source claimed, "Her family can't even keep up!"
She and 46-year-old French banker Olivier Sarkozy have been dating since 2012.
The upcoming nuptials will be Olivier's second marriage. He was previously married to Charlotte Bernard and shares two children with her.