She is expecting her second child with husband Hugo Taylor.
And Millie Mackintosh showed off her blossoming baby bump in two sequin dresses as she posed for a charity clothing campaign on Wednesday.
The former Made In Chelsea star, 32, looked incredible in the flattering purple and gold number as she confidently flaunted her changing shape.
Radiant: Millie Mackintosh showed off her blossoming baby bump in two sequin dresses as she posed for a charity clothing campaign on Wednesday
Millie is supporting TK Maxx’s Give Up Clothes for Good in support of Cancer Research UK for Children & Young People.
The beauty looked radiant in the professional shots as she opted for a natural makeup look and had her hair blow dried out.
In another image taken in her wardrobe she posed in a short gold dress and shiny heels which showed off her toned legs.
Wow: In another image taken in her wardrobe she posed in a short gold dress and shiny heels which showed off her toned legs
In a third stunning snap she slipped into an off-the-shoulder white number and put a protective hand over her tummy.
Millie said of the charity campaign: ‘Spending a lot of time at home during lockdown has made me think twice about how I can make more conscious choices with my wardrobe.
‘Whenever I notice clothes that I no longer wear or want anymore, I like to make sure someone else gets to appreciate them and get more out of them than me.
Mother: In a third stunning snap she slipped into an off-the-shoulder white number and put a protective hand over her tummy
‘Give Up Clothes for Good is a wonderful way to give your clothes a second life, whilst also funding crucial research into children’s and young people’s cancers.’
It comes after Millie and Hugo christened their one-year-old daughter Sienna on Saturday and celebrated with a beautiful Cotswolds event.
Sharing photos of the day on Instagram, Millie revealed she and Hugo, 34, had marked the occasion ‘surrounded by our favourite people’ at Soho Farmhouse.
The star told her followers: ‘We finally christened our darling Sienna today. We were surrounded by our favourite people and it was so worth the wait to do it restriction-free and luckily just in time before baby 2 arrives!’
Special day: It comes after Millie and Hugo christened their one-year-old daughter Sienna on Saturday and celebrated with a beautiful Cotswolds event
Favorite people: Sharing photos of the day on Instagram, Millie revealed she and Hugo had marked the occasion ‘surrounded by our favourite people’ at Soho Farmhouse
Millie wore a beautiful backless gown while Hugo looked dapper in a grey suit and blue shirt.
The doting parents dressed little Sienna in a gorgeous white dress, and enjoyed a meal on the grounds of the private members club.
Sitting down for lunch in one of the venue’s luxury rustic greenhouses, Millie revealed that the space had been beautifully decorated with flowers.
The group also tucked into an expertly-made white cake.
Family: The doting parents dressed little Sienna in a gorgeous white dress, and enjoyed a meal on the grounds of the private members club
Wow: Millie wore a beautiful backless gown while Hugo looked dapper in a grey suit and blue shirt
Post: The soon-to-be mother-of-two said: ‘We spend a lot of time in the Cotswolds so it felt like the perfect place to have a countryside christening’
Writing in a second post, the soon-to-be mother-of-two said: ‘We spend a lot of time in the Cotswolds so it felt like the perfect place to have a countryside christening.
‘Thank you @earlyhoursltd for creating the perfect floral installation for Sienna’s special day – my brief was white and cream flowers with green foliage and a touch of pampas grass to fit the rustic country setting and you nailed it.’
It comes after Millie, who is expecting her second child with husband Hugo, admitted she was nervous about becoming a mother again.
Finally: Millie told her followers in a social media post: ‘We finally christened our darling Sienna today’
She added: ‘Thank you @earlyhoursltd for creating the perfect floral installation for Sienna’s special day’
Matching: Both Millie and her one-year-old daughter wore pretty headwear
Tasty: The former Made In Chelsea star also shared a photo of the tasty white cake that they had made
Sharing her worries, Millie said while she knows Sienna will be the ‘best big sister’, she is worried how she will cope with dividing her time between her children.
The reality star wrote on social media: ‘So it’s suddenly dawning on me that very soon I’ll have two children under two, I’m starting to panic a little!! Sienna is growing up so fast at 16 months but is still a baby in so many ways! Plus I still feel like a child myself sometimes so how will I cope with two so close together?
‘I know Sienna will be the best big sister but I’m a little nervous as she is so used to having all of our attention, being an only child and the centre of everything is all she’s ever known.
Loved ones: Millie looked gorgeous while posing with her loved ones in the countryside
‘I’m worried about how I share my time and how I make sure Sienna doesn’t feel left out, as the new baby will require so much from me in those first few months.’
Calling on her followers to share their advice and experience, she added: ‘I’d love your advice on how to prepare Sienna for the new arrival, how to introduce them and juggle life with two under two, please share your words of wisdom with me in the comments!’
Millie announced she was expecting her second child with husband Hugo in June this year.
The couple married in 2018, with the pair both previously appearing on Made In Chelsea.
Adorable: Little Sienna looked adorable in her dress, which boasted a delicate Peter Pan collar