Kensington Palace revealed the news via Twitter on Thursday morning:
Harry’s choice should not come as a surprise. He performed the same role for William at his 2011 wedding to Catherine, Duchess of Cambridge:
Kensington Palace shared this adorable throwback snap of the brothers to mark the news:
The palace said William was “honoured to have been asked” and was “very much looking forward to supporting his brother.”
There’s no word yet on whether William, who this week welcomed his third child into the world, plans to organize a bachelor party for his younger sibling.