Actor Leonard Nimoy is 80. Actor Alan Arkin is 77. Actor James Caan is 71. Singer Diana Ross is 67. Singer Steven Tyler of Aerosmith is 63. Actor Martin Short is 61. Country singer Ronnie McDowell is 61. Drummer Monte Yoho of The Outlaws is 59. Actress Jennifer Grey is 51. Actor Michael Imperioli is 45. Country singer Kenny Chesney is 43. Actor T.R. Knight is 38. Actress Amy Smart is 35. Actress Keira Knightley is 26.