CONOR McGREGOR has been left 'heartbroken' after his dog Hugo passed away.
Hugo was with McGregor through the good times and the bad, even sleeping on a bed frame without a mattress alongside the UFC star.
McGregor shared the tragic news on , saying: "So heartbroken to say my dog Hugo has passed away.
"He was with me all the way, my closest companion.
"From sleeping on a bed frame without a mattress to everything else that came after.
"Thank you for all the work put in alongside me to get this life correct for our family.
"All the love and cuddles we will miss forever and ever our Hugo! Gutted.
"RIP the best boy Hugo McGregor."
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Hugo was a regular workout partner for the 33-year-old, often accompanying him on runs.
He was also a gentle pet for McGregor's three children, Conor Jr., Croia and Rian.
McGregor also posted a video of Hugo posing and taking in the sun whilst listening to Ed Sheeran.
He captioned the goodbye message: "We got there in the end my boy."