Author Ron Chernow is 76. Football Hall of Famer Randy Gradishar is 73. Radio personality Ira Glass is 66. Track and field great Jackie Joyner-Kersee is 63. Rapper Tone Loc is 59. Hockey Hall of Famer Brian Leetch is 57. Actor Jessica Biel is 43. Singer Camila Cabello is 28. NBA forward Jayson Tatum is 27.