It was the day for the Duke and Duchess of Sussex to get down to the serious business of this royal tour - but not without a bit of fun.
On day four of their 16-day visit to Australia, Fiji, Tonga and New Zealand, the focus returned to Prince Harry's Invictus Games for wounded war veterans.
Prince Harry, alongside Prime Minister Scott Morrison, Invictus ambassador and veteran's widow Gwen Cherne and Australian competitors Luke Hill, Ruth Hunt and Peter Rudland, climbed the Sydney Harbour Bridge to hoist the Invictus flag for the week.
More than 500 competitors from 18 nations will compete in 11 adaptive sports at venues across Sydney for a week from Saturday.
Harry set up the Invictus Games after visiting the US Warrior Games in Colorado in 2013, when he saw the positive impact sport was having on the recovery and rehabilitation of wounded servicemen and women.
Mental health was again front and centre for the royal couple of Friday.
It's an issue important to Harry and one he has raised several times during the visit, including reminding drought-affected farmers in Dubbo that it was important for them to reach out for help if needed.
It was a bit of a different gathering on Friday when the casually dressed and barefoot Duke and Duchess headed to Bondi Beach to meet a group focused on mental well-being.
The joined OneWave - a surf community group raising awareness for mental health and well-being - for their weekly "anti-bad vibe" fluoro circle on the sand.
While the group dressed in loud and outrageous fluorescent outfits, Harry and Meghan were more subdued, but their message to the group was loud.
The Duke, talking animatedly, spoke to them of his charity Heads Together, the time punctuated with laughter and applause from those in the group.
"They're super passionate about mental health.They are showing that mental health does not discriminate," OneWave co-founder Grant Trebilco said.
"They're saving lives talking about it."
After a walkabout with locals at Bondi, the couple made a midday unannounced visit to Macarthur Girls High School in Parramatta.
Although the students had worked out they were getting a visit from the royal superstars, they lost all their teenage cool to scream and shriek, giving Harry and Meghan a rock star welcome.
"When they walked in I felt like my heart stopped. Their presence just made everyone shocked," 15-year-old student Rhiannon said.
Meghan, who is about four months pregnant, stayed behind at Admiralty House while Harry climbed the bridge for the flag formalities.
They finished their day's events with formal calls on the prime minister and Opposition Leader Bill Shorten.
Their weekend will be filled with Invictus Games activities, including the opening ceremony at the steps of the Opera House on Saturday night.
