Gareth David Lloyd, who played Ianto in the popular series, did not realise that his character would have such an impact on fans.
He told BBC Radio Wales Drive: “I’m amazed it’s been for as long as it has, every year my mind boggles to think it’s still there.
“But also it’s very flattering, very moving, to think a character I had a contribution in creating has that effect, made that much of a mark on people.”
He previously told BBC Wales: “When we finished filming and I started to realise the cultural impact Ianto and his relationship with Jack was having, it was a big surprise, a very moving surprise.
“I certainly wasn’t expecting a shrine to be erected, and maintained for 20 years after.
“On one hand, it’s a bit bonkers, but on the other it’s a monument to the impact Ianto, and his relationship with Jack, had on the queer community, and one that I’m really proud of.”