The long-awaited moment for royal fans, came as they joined a crowd watching a wheelchair tennis match at the Invictus Games, the Paralympics-style event founded by Harry for wounded and injured servicemen and women and veterans.
Prince Harry rides shotgun at the children's driving challenge at the Invictus Games.
The couple took in a match of the wheelchair tennis.
The couple have been dating for a year or so, although strictly on the quiet - this is the first time they have appeared together at an official event.
We can't wait to see what's in store for the rest of the Games.
The couple's step into the public eye together will likely fuel speculation that marriage is on the horizon and only add to media interest in Markle.
What do you think of Prince Harry and Meghan Markle's PDA?
"It's clear they're absolutely besotted with each other".
Toronto resident Markle's presence was eagerly documented during the opening ceremony, as she watched on from the stands.
Meghan, who films in the area for her role in U.S legal drama Suits, made a decision to show her support from a distance by choosing to sit next to a pal rather than next to her boyfriend.
Last week, Prince Harry was seen visiting cast and crew members of his girlfriend's hit show during his stay in Toronto.
Earlier this month Markle gave her first public comments about her new relationship during an interview with Vanity Fair magazine, revealing she was dating Prince Harry for six months before it became public. Markle and the Prince were not seated together but Markle appeared about 30 feet away from her royal boyfriend to show her support.
"We're two people who are really happy and in love", she said.
Prince Harry stopped to shake the hand of the Kiwi competitor who took the opportunity to introduce the taniwha he had been carrying around Toronto with him.