Movember kicks off this weekend, all to raise awareness and funds for men's health issues, such as prostate cancer.
Irish 'Mo Bros' register at Movember.com, start the month clean shaven and have the 30 days of November to grow a man-made moustache.
1 in 8 Irish men will be diagnosed with prostate cancer in their lifetime.
Movember Ireland Country Manager Neil Rooney says guys around the world are getting involved:
Here's an image created for Movember over the weekend in Co.Clare on the Cliffs of Moher: