The Danish Prince Consort - father-in-law of Tasmanian-born Princess Mary - visited the Olympic sailing competition.
Prince Consort Henrik was in Weymouth on Monday to watch Jonas Hogh-Christensen who lead the Finn Class.
Henrik, husband of Queen Margrethe II, spent much of the day out on a boat watching the action at close quarters.
The French-born prince, 78, then met the rest of the Danish sailing team back at the boat park.
The Danish royal family have strong links to sailing.
Crown Prince Frederik has competed at European and world championship sailing events and has previously raced against Australia's world champion 470 sailor Malcolm Page.
Prince Frederik famously met his Australian wife at the Slip Inn, Sydney, while attending the 2000 Games.
Princess Mary is currently attending Olympic events in London.
The British royal family has not yet attended any of the Olympic sailing events.
But a visit by one of the senior royals is expected.
NZN