The pair - who reignited their relationship earlier this year - made the most of the September sun as they chilled out in London's Hyde Park.
Fashion designer Millie, uploaded the photo to her Instagram, writing "Happy Saturday", along with a heart-eye emoji.
Resting her head on her beau's shoulder, the former Made In Chelsea star looked blissfully happy as she closed her eyes while smiling for the camera. Dressed in a white embroidered top, Millie lwas stylish for her relaxing day and shielded her eyes in a pair of black shades.
Meanwhile Hugo wore a casual denim shirt and opted for a pair of mirrored shades - which no doubt were very likely from his own eyewear brand, Taylor Morris.
Millie and Hugo shocked fans when they rekindled their romance and confirmed the rumours with an Instaagram post back in May, which showed the pair enjoying a kiss in Monaco.
The posh duo were originally together in the early Made In Chelsea days, but soon split after it emerged Hugo had cheated on Millie with her friend Rosie Fortescue.
Millie went on to marry rapper Professor Green, but after two and a half years of marriage, they sadly announced their split in February.
At the time, the pair had released a joint statement, reading: "It is with sadness and regret that we confirm our separation.
"It is a mutual decision, we still care deeply about each other and would like it to be known it is on amicable terms and we wish each other well."
Since getting back together, Millie and Hugo have enjoyed a summer of parties and holidays.
Opening up about their reunion, Millie told The Telegraph: "I'm great. He's great. I'm very happy, that's all I can say."