The girls enjoyed a catch-up on Tuesday night (10 June) by dining out at Japanese restaurant Roka before heading to the Beefeater Grill's 40th anniversary party, which was held at The Drury Club in London.
Ahead of their reunion, Caggie tweeted: "Off on my date with @camillamackintosh for some sushi at Roka then off to the drury club. #goodtimes."
Make-up artist Millie, who is a contestant on this year's Celebrity MasterChef, showed off her sunkissed pins in a mosaic print mini skirt and white off-the-shoulder crop top, teamed with tan-coloured heels.
Meanwhile, Caggie showed off the recent results from her bootcamp training in a printed playsuit with a plunging neckline, which she teamed with orange shoes.
The reality stars were joined at the event by the likes of Donna Air, Vernon Kay, Laura Whitmore, Jade Ewen and current MIC star Andy Jordan.
Since leaving MIC, both Millie and Caggie have continued to work on solo projects. Caggie, who left the show after the third series, has launched a successful fashion line called ISWAI.
Meanwhile Millie, who is married to rapper Professor Green, recently teased the launch of her very first fashion line!
"My clothing range will be revealed around August, so that's my main focus at the moment," Millie told Reveal last month. "I've really wanted to tweet pictures of the samples but I've had to hold back. I don't want anyone stealing my ideas!"
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