It's Taylor Swift's birthday ... and among the thousands sending her well wishes was none other than her boyfriend's employer, the NFL!!!
Travis Kelce's league cut a TikTok video on Thursday to celebrate Swift's 35th trip around the sun ... and it's adorable as hell.
Check it out -- the 31-second clip features a bunch of highlights of Swift at Arrowhead Stadium ... as well as some mushy moments between her and her man on the "Eras Tour."
So far, the Swifties are eating up -- it's only been posted to the NFL's social media page for about five hours, but it's already got 1 MILLION views.