Sarah 'Fergie' Ferguson, divorced from her ex Prince Andrew in 1996, but due to the special rule, she could keep her title. Not only this, but Fergie still lives with Prince Andrew at the Royal Lodge.
It was well documented that the ex-couple spent much of lockdown living under the same roof. The couple married in 1986 but announced they were having an 'amicable' breakup in 1992.