The couple were pictured arriving at the launch of Very's Christmas Crib and made a gorgeous sight - as usual - as they posed for waiting photographers.
Saturday's singer Rochelle has her own clothing line with the brand and, being the face of their latest festive venture, it's no surprise she and her hubby were asked to front the event.
Standing with one hand on her hip and a big smile on her face, Rochelle was wearing the Sequin Cut Out Back Mini Dress from her line of party frocks.
The dress is covered in deep blue sequins and has shoulder pads to vamp up the glam factor! Rochelle teamed hers with a simple pair of nude sandals and a bright orange manicure.
Marvin, meanwhile, opted for a checked shirt, smart jeans and shoes and kept off the December chill with a long, grey coat. We hope he offered it to his lady at the end of the night!
Last month, Rochelle donned a sizzling pink Bardot dress before climbing in to a giant Martini glass to launch Very's Christmas Crib.
The competition gives fans the chance to style their very own luxury Christmas party - including the interior design, guests' clothes and presents under the tree.
Meanwhile, it's been a busy week indeed for this mum-of-one. On Tuesday night, Rochelle joined her Saturdays bandmates at the Victoria's Secret Fashion Show in London and, on Wednesday, the girls led the way at the Cosmopolitan Inspirational Women Of The Year Awards.
But mummy duties don't stop for a lie-in! Yesterday, Rochelle shared a sweet Instagram video of her "alarm clock" daughter Alaia-Mai calling for her over a baby monitor.
Rochelle told her fans: "Someone didn't get the 'let's have a lay in memo' #earlierthanever. There's now a princess in my bed! Peppa pig o'clock #teething."
Listen to Alaia-Mai's little voice here!