David Letterman's first wife was Michelle Cook. However, like many in Hollywood and many celebrities, she was not David Letterman's only wife.
David Letterman's first wife was Michelle Cook. She was Letterman's college girlfriend and he married her in 1969. Letterman was married to her for a period of eight years before getting divorced in 1977.
David Letterman has had a notoriously complex love life. After divorcing Michelle Cook, he had a long affair with a woman named Merrill Markoe, who did some writing and acting for his show and was affiliated with him through work. He then had a girlfriend of 23 years, Regina Lasko, who worked for him and with whom he had a son. She became his second wife.
After he married Lasko, there was a scandal where he was cheating on Lasko with a number of staffers and others in a secret love nest above his offices at CBS.
David Letterman is a long standing late night television show host and comedian. His show, the "David Letterman Show" is a popular late night comedy and variety show and has long been competition to the "Tonight Show" with Johnny Carson and later with Jay Leno, as well as competition to such shows as "Late Night" with Conan O'Brien.