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Jennifer Gates' sister shared some images from the prep for her wedding to Nayel Nassar.

Bill and Melinda Gates’ daughter Phoebe shared some behind-the-scenes photos of her makeup prep for her sister Jennifer Gates’ wedding Saturday.

The 19-year-old younger sister of Jennifer shared a pair of images on her Instagram Story Sunday that showed her sitting in the makeup chair getting ready for Saturday's lavish ceremony.

Bill Gates, Melinda Gates and Jennifer Gates attend Global Champions Tour of Monaco 2017 on June 23, 2017 in Monte-Carlo, Monaco.

Attendees also included Jennifer’s parents Bill, 65, and Melinda Gates, 57, and brother Rory, 22.

At the time, Jennifer shared the news on Instagram with a photo of the two of them on a ski vacation.

Jennifer, a medical student, is also an accomplished equestrian who was part of the Longines Global Champions Tour and the Global Champions League

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Mutual Fund and ETF data provided by Refinitiv Lipper