WATCH this video to see Kate and Harry arrive at Westminster!
The Duke was a surprise addition to the memorial line up with Buckingham Palace announcing he would attend just hours before the service.
Express.co.uk reports this was in case Meghan went into labour.
The Sussexes' social media post referenced their time in Sydney where they paid their respects at the Anzac memorial on their royal tour of Australia last year.
Harry, 34, dedicated ten years of is life to British military duty, completing two tours in Afghanistan and four weeks of service with the Australian Defence Force.
Fans were quick to notice how tired Harry looked at the Anzac service, with one user wondering: "Hmm. He looks tired. Could there already be a baby?"