The only husband I was aware of was Tony Curtis but she married again for the fourth time after their divorce. The final husband was Robert Jay Brandt and they were married for forty two years before he died.
Take a look, he's a hunk.
From a New York Times obituary, "Born July 7, 1927, son of Lillian and Walter Brandt from Burlingame, CA, he served as a US Marine. He was an avid sportsman and adventurer. Bob was an innovator in the securities industry, founding Brandt Zwick and Company with Barry Zwick and then later Robert Brandt and Company. He married Ms. Leigh and raised her two daughters, Kelly Curtis and Jamie Lee Curtis. At the time of Ms. Leigh's death in 2004, the couple had been married 42 years." He had been suffering from Alzheimer's.
Her first marriage took place when she was 15 and was annulled. Then she had a brief two year marriage before marrying Tony Curtis. They were married for eleven years.
I just watched a movie from TCM, The Doctor and the Girl, a much better movie than I expected. I didn't realize the main actress was Janet Leigh until the ending credits. She was only about 21 at the time and very beautiful without much make up. So I just emerged from the google rabbit hole with this bit of info.