So, this is her secret!
Kate Middleton keeps herself looking picture perfect at royal events thanks to a $22 face oil by beauty brand Trilogy, according to [Allure](http://www.allure.com/story/kate-middleton-affordable-face-oil?mbid=nl062617blast&CNDID=48652465&spMailingID=11348377&spUserID=MTgxMjUyMTAxODk1S0&spJobID=1182296304&spReportId=MTE4MjI5NjMwNAS2) magazine.
The 35-year-old Duchess of Cambridge has been rumored to use the special, plant-based rosehip oil — an anti-inflammatory product that also fades discoloration and protects the skin from aging — for years.
Kate in 2017 and the rosehip oil (inset). (Photo Credit: Getty Images; Instagram)
Back in 2015 — while Kate was pregnant with her second baby, Princess Charlotte, now 2! — a source revealed to Us Weekly that Kate and her mom, Carole Middleton, both love using the affordable Trilogy face oil. The Duchess was allegedly first introduced to the all-natural product during her 2014 royal tour of Austalia and New Zealand.
"Kate continues to use rosehip oil in her daily skincare regiment," the insider told the entertainment news outlet. "She loves the effect is has on her skin. [Her mother] Carole is also a fan."
In addition to her skincare regimen, Prince William's stunning wife also reportedly swears by Bobbi Brown makeup — she wore it on her April 2011 wedding day! — and often uses the beauty brand's gel eyeliner, foundation, brow kit, matte lip color, and lip brush.
Check out the gallery to see Kate's royal diet secrets!