Wearing a Mulberry coat, Kate chatted to officials from Mid and East Antrim Council while William spoke to DUP MP Ian Paisley, who presented him with a wooden walking stick.
Speaking at the event, the Duke of Cambridge hailed Mary and her work to get young people involved in athletics.
As part of their visit to Ballymena, the couple also visited St Joseph's SureStart centre in the Dunclug area of the town, which supports parents with children aged under four years.
Kate laughed as she took her turn, while her husband teased her.
She kept her makeup simple, opting for subtle blush and nude lips, and let her long brown locks drape over her shoulders.
There were cheers as the delighted Duchess, 37, set her Harp Ice lager down, despite appearing to have a bit too much head.
'Pushed back,' says India to Pakistan claims of 'violating' Indian air space
Pompeo's statement, issued February 26, followed the Indian air attack in the disputed Kashmir region. The US, along with China and the European Union, have called for cooler heads to prevail.
Syracuse coach Boeheim trying to cope with tragic accident
Jorge Jimenez, 51, had exited his vehicle after striking the guardrail on Interstate 690 when Boeheim's vehicle hit him. After a heartfelt moment of silence and announcement before the tipoff, the much-awaited contest got underway.
What do Trump and Kim want from their summit?
President Donald Trump began tweeting as the morning began in Vietnam ahead of the summit with Kim Jong Un. Engel, D-N.Y., said House Democrats are ready to be constructive partners in implementing a possible U.S.
He watched the tap with a keen eye and commented "look at that bad boy", concluding: "Perfect...good enough for an advert".
The couple, the Duke and Duchess of Cambridge, are on a two-day trip to the British province, with the focus on Wednesday on the benefits of sport and outdoor life on childhood development.
The appearance at Empire Music Hall wrapped up an action-packed day of activities.
There has been plenty of speculation as to whether the Duke and Duchess will have a fourth child, to follow in the footsteps of the Queen and Prince Philip.
Yesterday they visited Windsor Park stadium to learn about the Irish Football Association's youth programmes and they went head-to-head during a football match, where William joked his wife Kate "goes for the ankles".