Oprah Winfrey is turning 55 today. Writer/director Ed Burns is turning 41. Heather Graham is 39. Athina Roussel—the daughter of Christina Onassis and only living heir of Aristotle—is 24. Top cardiothoracic surgeon David Adams is 52. Tommy Ramone is 57. Actor Nicholas Turturro turns 47. Actress Sara Gilbert is turning 34. And Tom Selleck celebrates his 64th birthday today.