Free donuts are being given away to celebrate National Donut Day 2012 on Friday June 1.

At Dunkin Donuts a free donut will be given away with the purchase of every beverage, with the offer being available all day Friday until supplies run out.

On Twitter, Dunkin Donuts became a trending topic as National Donut Day swept the internet and fans of Dunkin Donuts expressed their excitement.

"Dam...gonna get me sum Dunkin Donuts 2day dudes!" wrote Shameless.

"Apparently it's national free Donut Day at Dunkin Donuts," wrote Ariel. "That is of course if you buy a drink WHICH I DID. FREE DONUT YA'LL."

Krispy Kreme donut chains are also offering customers free treats with no purchase necessary. The franchise is celebrating its 75th year in business this year - and the company has also become a trending topic on Twitter Friday.

"Happy National Doughnut Day," wrote Zoey. "I'm going to Krispy Kreme for my free doughnut... Free tastes better than anything else #happy"

Angela wrote, "FREE DONUT DAY! Obviously I'm hitting up Krispy Kreme to cash in on my Friday freebie."

"National Doughnut Day," asked Twiz. "Guess I might need to get some Krispy Kreme action today. lol"

Dunkin Donuts and Krispy Kreme are not the only stores celebrating National Doughnut Day 2012. Numerous smaller donut vendors across the nation are also celebrating by offering free treats.

Tags: donuts