The former Made In Chelsea star is on holiday in the US with husband Professor Green, and she's been sharing every important moment with her Instagram fans.
She began her break in Palm Springs, California. In one picture she can be seen flaunting her fabulous figure in a white bikini, with an inflatable rubber ring around her head.
Alongside the photo, she wrote: "Catching some last desert rays."
And in another pic she's posing with hubby Professor Green. Underneath that photo she wrote: "It's been emotional #ace #palmsprings #coachella."
The pair then headed to Los Angeles, where they attended a secret Arcade Fire gig alongside A-listers including Jake Gyllenhaal and Breaking Bad's Aaron Paul.
Millie posted a photo of herself and pal Caroline Flack yesterday (21 April), and wrote: "Red lights #Roxy #arcadefire @flackcaroline @professorgreen."
On the weekend, Millie flaunted her tiny waist in bikini pictures taken while by the pool.