"John and David respected each other," Ono wrote in a statement posted to her website. "They were well matched in intellect and talent. As John and I had very few friends we felt David was as close as family."
Lennon was shot and killed outside his New York apartment. Following that tragic incident, Bowie became even closer to the family, Ono wrote.
"When Sean was at boarding school in Switzerland, David would pick him up and take him on trips to museums and let Sean hang out at his recording studio in Geneva," Ono remembered. "For Sean this is losing another father figure. It will be hard for him, I know. But we have some sweet memories which will stay with us forever."
Sean Lennon also posted a message on social media expressing his heartbreak over losing Bowie.
This article was originally published by The Hollywood Reporter.