"My heart is full of so much sadness and sorrow, but also so much love and gratitude. I got 14,501 days with that man and I know that is such a blessing," the metal legend's youngest child wrote

Jack was Ozzy's only son with Sharon Osbourne, whom the rocker married in 1982. The couple also shared daughters Aimée Osbourne and Kelly Osbourne.

Jack Osbourne honored Ozzy Osbourne with a touching Instagram tribute featuring rare personal photos of the Black Sabbath rocker with his grandchildren.