Over 300 swimmers will be braving the elements today - to take part in the annual Liffey Swim.
Now in it's 94th year - the river has been specially cleaned for the event.
The men's 1,600 metre race kicks off at 12.30pm - while the women's race begins at 1.30.
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Dublin's Lord Mayor Oisin Quinn says many serious athletes will be taking part:
You can watch a video of the swim below: