Actor John Lithgow is 79. Singer Jennifer Holliday is 64. Filmmaker Jon Favreau is 58. Former first daughter Amy Carter is 57. “South Park” co-creator Trey Parker is 55. Comedian Chris Kattan is 54. Musician Pras Michel is 52. Filmmaker Jason Reitman is 47. Actor Gillian Jacobs is 42. Actor Rebecca Ferguson is 41.