Bill Murray's made it 75 times around the sun ... and we're looking back at some of his most iconic moments through the years!

The star's gotten used to being photographed at red carpets in his acting career -- it's really gotta feel like "Groundhog Day" at this point -- but all the glitz and glam is really just part of the job.

Plus, Bill's a man of the people, as he hasn't had too many problems with greeting fans on the street or keeping it low-key while hanging out with friends ... check out our video to see even more of the good times!

Happy Birthday Bill!!!