The power couple kept it low-key and sported baseball caps as they picked up some essentials in luxury grocer, Erewhon Market.
The model, 36, looked nothing short of sensational in her chilled attire and appeared to be in good spirits next to Jason.
The former Victoria’s Secret Angel donned a grey T-shirt and tiny black shorts while the actor, 56, opted for a stone-washed jumper.
The mother-of-two, who shares Jack, six, and Isabella, 18 months with Jason, complimented her look with a black handbag and white trainers.
Her casual evening attire comes after she was spotted enjoying a leisurely lunch at the exclusive members-only San Vicente Bungalows in the nearby neighbourhood of West Hollywood.
She flaunted her toned figure in an all-white outfit comprised of a low-cut blouse and a white floor-length skirt.
Rosie and Jason, who have been together since 2010, got engaged in 2016 and revealed they are in no hurry to rush their wedding preparations.
Back in 2018 when their son was 𝐛𝐨𝐫𝐧, Rosie told ET that the wedding wasn’t a ‘huge priority.’
She said: ‘We’re looking forward to that time. It’s also not a huge priority for us; we’re so happy.
‘I think it will be fun to do it when the 𝑏𝑎𝑏𝑦’s grown up a bit and he can be involved in the wedding.’
Rosie has previously described the ‘shift in idenтιтy’ she experienced after becoming a mother, which felt like ‘mourning the loss of [her] old life’.
Speaking in an interview with Net-A-Porter’s PORTER magazine in 2021, she explained: ‘For a period after I had my first son, there was a real shift in idenтιтy, and a sort of mourning of the loss of your old life, and who you were.’
Expanding on the transition from model to mother, Rosie added: ‘I just remember feeling like the rug was pulled out from underneath me.
‘I’d had all these years of being really independent, being able to come and go as I wished, being self-employed to a degree, calling the sH๏τs, and then suddenly having [something] that really anchored me to home life.’