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Prince William, Prince Harry

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As the royal baby watch heats up, Prince William is still looking cool, calm and collected.

During the weekend Kate Middleton was expected to give birth, the Duke of Cambridge was spotted playing polo with Prince Harry Saturday, competing against his younger brother in the Kent & Curwen Royal Polo Cup in Sydmonton, England. 

Kate Middleton, Duchess Catherine

SIMPSON/BUSHELL

And after Prince Harry beat the 31-year-old dad-to-be in the match, according to People, the duo was back at it again Sunday--at another polo match for charity at the Jerudong Trophy at Cirencester Park Polo Club in Cirencester, England.

Meanwhile, the Duchess of Cambridge, who's been laying low at Nottingham Cottage in London, has relocated to her parents' home in Bucklebury to spend some time with her family before the baby's birth, according to the Daily Mirror

Royal Baby, Prince William, Kate Middleton

Rex USA

Kate's parents' home is about 53 miles away from St. Mary's in London--the hospital where she is due to give birth, according to the site.

Which means the royal baby watch is still on.

Whenever Kate does deliver the baby, though, St. Mary's will be ready.

The hospital has beefed up security prior to the royal baby's arrival, doing a massive sweep of the facilities and adding security checkpoints to ensure the royal couple has as much privacy as possible.