Eve Donald has joined the club from Dundee United for the 2023/24 campaign.
The 23-year-old defender featured 27 times for the Tangerines last season and played a vital role in securing their top-flight status.
“I’m very grateful for the opportunity to sign for Motherwell,” Eve Donald said.
“The goals and ambitions set by both coaches and players at this club is something I can’t wait to be a part of.”
“We are delighted to get Eve on board,” head coach Paul Brownlie.
“We identified her as one of our top targets during the transfer window, as she further enhances the quality of the squad.”
Donald becomes Brownlie’s fourth summer signing.