The Love Island beauty looked sensational in the long net gown, and she popped black underwear beneath the see-through look.
Millie wore her highlighted locks down and popped a black floral choker on to accompany the dress.
Her footwear was also on point with the 26-year-old opting for black stilettos with red roses attached.
Millie twirled around for her fans as she modelled the chic PLT dress.
Fans of the star were left in awe with the dazzling look, as one wrote: “Wow wow so gorgeous.”
A second added: “Cutest shoes and gorgeous dress,” and a third echoed: “Sensational Millie.”
It comes after the Love Island winner opened up about her sex life with Liam Reardon after the pair rekindled their romance.
The couple – who went their separate ways in July 2022 , but reunited earlier this year – have been making up for lost time.
Influencer Millie opened up about the best sex of her life, saying her favourite romp has been with Welsh hunk Liam.
Joining best pal Chloe Burrows on Chloe vs The World podcast, a listener was keen to know: “Who is the best person you’ve had sex with?”
Millie quickly replied: “My current boyfriend.”
Chloe then addressed Millie and Liam attending the Barbie premiere together in London last month.
Chloe teased: “Were you on your own,” to which Millie burst out laughing and replied: “No, that’s my boyfriend.
“This is where the wholesome part comes in for me, we have good times together.”
It comes after Liam revealed that he and Millie were back on during an exclusive chat with The Sun.
He told us: “When people break up and get back together sometimes it doesn’t always work.
“A lot of times it doesn’t because people grow apart and they have to accept what has happened.
“But if you get back together and really make an effort to make it work, it can work.”