Du Preez has been part of the Stars roster since WBBL|03 and this year will make her 50th appearance in the WBBL.
Cripps, who re-signs with the Stars for a second year, made her debut in green last season.
For Day, it marks her first WBBL contract. The top order batter and left arm spinner plays at Plenty Valley Cricket Club.
We're heading to Sydney for the @WBBL season!— Melbourne Stars (@StarsBBL) September 4, 2020
While we won't be able to play in front of our home fans, there will be plenty of opportunities to get behind #TeamGreen this summer! 💚
Can't wait for October 25! 🙌https://t.co/yzfI79Ag5y
Du Preez said she was looking forward to the WBBL season.
“It has been a crazy year so far, but I am looking forward to the WBBL, joining the ‘bubble’ and catching up with all my friends at the Stars,” du Preez said.
“The club has made some good signings and we should be confident about we can achieve this season.”
Melbourne Stars WBBL Coach Trent Woodhill said was pleased with the signings.
“Mignon is the all-time leading run scorer in WBBL for the Stars with over 1,100 runs to her name. We were always keen to retain her experience and versatility in being able to play a range of roles through the batting line-up,” Woodhill said.
“It was great for Lucy to get a couple of games last year and a taste for what WBBL is about. We’re hoping to build a similar experience for Sophie during the course of this season.”
Melbourne Stars General Manager Nick Cummins said “our squad is shaping up well for this season. We’ll be finalising some final international signings in the next week and we think we’re well set up to be very competitive this season.”
Current squad: Meg Lanning, Elyse Villani, Mignon du Preez, Annabel Sutherland, Lucy Cripps, Alana King, Holly Ferling, Erin Osborne, Tess Flintoff, Georgia Gall, Sophie Day, Nicole Faltum