Actress Joan Collins has paid tribute to her “first boyfriend”, as fellow actor David McCallum sadly died at the age of 90.The Scottish actor, who starred in the 1960s hit spy drama The Man From U.N.C.L.E. had died of natural cases in New York City, his son Peter announced on Monday 25 September. Following the announcement, Joan took to social media to share a throwback picture with David as she revealed she is “so sad” to hear about his death.