Rebecca Judd dons a face mask as she picks up supplies during the COVID-19 lockdown in Melbourne

She has been in lockdown at her $7.3million Melbourne mansion with her husband, Chris Judd, and their four young children.

And on Monday, Rebecca Judd, 36, stepped out to purchase supplies from her local shops.

The 36-year-old WAG cut a casual figure and donned a protective face mask for the outing.

Rebecca kept warm in white jeans, a jumper and jacket from her Jaggad sportswear line alongside leopard print sneakers.

She held her phone, car keys and a small white bag in her hand as she walked over to her car after her shopping trip.

The mother-of-four had her long brunette hair out but tied it into a low ponytail after leaving the shops.

Last week, Premier Daniel Andrews announced face masks have become mandatory across Melbourne and Mitchell Shire in a bid to stop the spread of COVID-19.

Those who disobey the new government directive to wear masks outside the home, will face a $200 fine.

Rebecca is isolating in her Melbourne mansion with her husband, retired AFL player Chris Judd and their four children.

Rebecca and her husband, Chris, completely transformed the Spanish colonial-style property after buying it in March 2018.

They replaced its dated aesthetic and apricot colour palette, and added modern touches like gold brass fittings, marble, and steel doors.

The couple kept the home’s defining architectural feature – its arches – and used this shape as a theme throughout the interior.

The home has a gym, a tennis court that can be turned into ‘a footy oval or cricket pitch’, and a magnesium salt pool.

It also has a spacious wet bar complete with a snooker table and a fully-stocked bar, as well as a sofa.