And what followed was a Wembley-bound run to remember.
Chilwell went on to feature in Palace's 3-0 semi-final victory over Aston Villa, helping Oliver Glasner's side book their place in the showpiece at Wembley.
He was an unused substitute as Ebere Eze's goal secured a historic 1-0 victory over Manchester City – but he was certainly not on the sidelines when it came to the celebrations.
For Chilwell, lifting the FA Cup completed his collection of English football's major honours, having already won the Premier League, Champions League, Europa League, UEFA Super Cup and FIFA Club World Cup.
"With this group, such a top group of boys, the manager, all the staff are all amazing," he said at the time. "To win it with this group was amazing and then obviously the celebrations after with everyone were special as well. It was a brilliant night."