The Absolutely Fabulous star was pictured happily chatting to fellow shoppers as she queued to get into the Battersea branch for 30 minutes to stock up on supplies amidst the coronavirus lockdown.
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The Wolf of Wall Street star appeared in jovial spirits while adhering to the government's two metre social distancing rules as she took an animated photo with a male fan.
Joanna wrapped up for the outing in a navy coat and black trousers while holding her bag for life from French supermarket chain Carrefour.
Currently shoppers have to queue outside to reduce the number inside, abiding by an one-in-one-out policy, to abide to social distancing measures.
However, major supermarkets have set aside special shopping times exclusively for pensioners, vulnerable people and NHS staff.
Currently, the TV star is spending lockdown with her husband, opera conductor Stephen Barlow, 65, and recently acknowledged her privilege compared to many during the pandemic.
Speaking to the Telegraph, she said: "I'm lucky that we're rich. We live in a lovely house, we've got food, I've got a garden. I'm thinking of people who live on the 14th floor with three children. What are they going to do? It's extraordinarily difficult."
Elsewhere, the TV star revealed in March she was ambushed by armed bandits in Haiti while making a documentary, Hidden Caribbean: Havana To Haiti.
The actress was filming during a riot in the troubled Caribbean country when her car was stopped by a group of men who demanded: "We want your money or your life."
"Suddenly there was a blockage across the road. They’d put branches down," Joanna recalled.
"Our bodyguards got out and said, ‘Come on guys, clear it away'.
"And they said, 'No, we want your money or your life.' Sometimes they dig trenches, pour oil in and set fire to it, then they come with guns and take your wallets."
The gang eventually let them pass unhurt. Joanna was ambushed in the "catastrophic" capital Port-au-Prince, where there were riots breaking out like "wildfires".
The Absolutely Fabulous star explained: "We arrived on the day of a riot, so we had a police escort to the hotel.
"Riots break out like wildfires across the land and if you’re in that place, you’re stuck."
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