Rebekah Vardy is suing Coleen Rooney for libel over their online fallout last year, according to a court listing.
Rooney claimed Vardy had been leaking stories about her to the press.
Vardy, 38, denied any wrongdoing and later said the stress of their public row had caused her to have severe anxiety attacks.
In October 2019, Rooney, who is married to footballer Wayne Rooney, accused Vardy on Twitter of leaking private Instagram stories about her to The Sun newspaper.
She claimed she had set the privacy settings to ensure the stories were only visible to one account, which belongs to Vardy's.
She said the posts which she set to be only viewable by Vardy's account were fake, including that she had been considering gender selection in order to have a baby girl. These stories were written about by some newspapers.
Shortly after Rooney's public accusation, Vardy responded on Instagram denying any involvement.
The dispute made news around the world and was dubbed #WagathaChristie.