Patrick Mahomes and Brittany Matthews are days from getting hitched -- the couple just arrived in Hawaii for their wedding day!!
Mahomes' lil' bro, Jackson, is providing some breadcrumbs surrounding the ceremony via Instagram ... revealing everyone's in Maui leading up to the big event.
Now that the location has been confirmed, the next question is -- who are Patrick's groomsmen?!
Jackson shed a bit of light on that, too ... revealing he's Patrick's best man by posting a pic with the superstar QB (sporting a bright-patterned RompHim) and saying, "Best Man type vibes ud83eudd19ud83cudffd.