Rumer and Tallulah Willis have revealed how they felt when their mother Demi Moore started dating Ashton Kutcher.

In an interview with Harper's Bazaar, Rumer, 18, admitted she used to have a crush on Kutcher, who married Moore in 2005.

"I had a poster of Ashton when my mum and he met, so I can appreciate the fact that he is a handsome man, but he is my stepdad, and he has given me a healthy perspective on relationships."

Rumer also described her stepfather as "a mentor", explaining: "I look up to him and try to emulate the way he lives".

Tallulah, 14, added: "I was in fourth grade [when they started dating], so it didn't hit me as much as it did Scout (16, daughter of Moore and Bruce Willis) and Rumer. But it still hit me a little, and it still does now. I find it weird that people think my stepdad is hot."