Lucy Lanigan-O'Keeffe, the assistant headteacher at Thomas' Battersea School, where Prince George attends school is engaged to Prince William's longtime best friend Thomas van Straubenzee, The Sunday Times reports.
The outlet claims van Straubenzee, who is also Princess Charlotte's godfather, proposed last week to Lanigan-O'Keeffe, who teaches outdoor learning and mindfulness at the school.
William is set to usher at the wedding while George and Charlotte will serve as pageboy and bridesmaid.
The van Staubenzees have known William and Prince Harry since childhood. Both Thomas and his younger brother Charlie van Straubenzee were ushers at Harry's royal wedding and Charlie even gave a speech.
WATCH: Princess Charlotte Bosses Prince George Around Kate Middleton's Garden.
This article originally appeared on marie claire Australia.