Sylvester Stallone celebrated his youngest daughter’s high school graduation by posting a series of sweet photos documenting the day.The Rocky star commemorated his daughter’s huge milestone by posting some heavily-filtered family photos onto Instagram on Tuesday, June 15. The 74-year-old let fans in on the intimate moment with his daughter, 19-year-old Scarlet Rose Stallone, by posting a picture of them alongside his wife, Jennifer Flavin.