Grab a tissue ... you may need it!
Steelers rookie quarterback Kenny Pickett literally brought a young boy to tears (happy ones!) when he signed a football for the kid, and the sweet moment was caught on video!
It all went down at Saint Vincent College in Pennsylvania on Wednesday ... where the Steelers are holding training camp.
The clip starts with 24-year-old Pickett -- a first-round draft pick out of the University of Pittsburgh -- meeting a bunch of Steelers fans and signing autographs. One of the fans was a young boy named Phillip .