It’s been a century of love for English rock legend Elton John and his filmmaker husband David Furnish – and they now have two sons. Their relationship has always been in the limelight for good reasons, as they regularly attended events and fundraisers with their hands interlocked. The couple entered into a civil partnership back in 2005. As soon as same-sex marriage became legal in 2014, they converted their union to a marriage on the same date of their partnership, which was on December 21.

How do they keep their love alive? They write love notes to each other regularly. The couple gives credit to this ritual when asked how they make their marriage work.