Emma Watson said everyone wanted to be on-set for her 'incest' moment in Harry Potter

Emma Watson said everyone wanted to be on set to see her 'incest' moment in the Harry Potter film series.

While it wasn't literally incest, the actor still says it was 'the most horrible thing' she's ever had to do.

In the final movie of the wizarding franchise, Harry Potter and the Deathly Hallows: Part 2, Watson's character Hermione had to get close with one of her co-stars.

And while for fans of the series it was a long time coming, it was a very different experience for the two actors involved.

During an interview with at the time, Watson opened up about what it was like getting off with Rupert Grint, who played Ron Weasley, and who the actor said was like a brother to her.

Fortunately, though, you'll be pleased to know, he was neither her brother nor any other kind of relation.

But that didn't make it any less weird for the pair.

Warner Bros.

Back in 2012, Watson told Jonathan Ross: "We did the kiss two weeks ago, and it was the most horrible thing I've ever had to do.

"Not because Rupert isn't lovely, and there are millions of girls out there who would probably chop their left arm off to kiss him, but it just felt like incest. That's the only way I can describe it.

"The great thing about kissing is that you close your eyes, so it was fine when I was actually kissing him because I had my eyes closed. So I could not think about the fact that it was him.

"The worst bit is when we had to open our eyes and look at each other because then it was just like, and then we couldn’t keep going."

Speaking during the HBO reunion special, Return To Hogwarts, which came out last year, Watson sat down with her former co-star to look back at that time.

And it seemed that her feelings towards their kiss hadn't changed a bit.

“Obviously us kissing was the most horrifying thing either of us have ever had to go through”, she said, to which Grint agreed with a simple, and rather awkward, “Yeah.”

HBO Max

Watson then revealed that the scene 'was meant to be this dramatic makeout, but we [her and Rupert] just kept laughing'.

She then added that that the kiss 'felt wrong on every level', because her, Grint and Daniel Radcliffe 'are so much siblings'.

Joining the pair for a chat, Radcliffe, who famously played the titular role in the franchise, admitted that he didn't really help things at the time.

By his own admission he was a bit of a 'd**k' about the whole thing.

"I did not make this better, because I've been told significantly that I was just being an absolute d**k about this and was like, 'I'm gonna come on set and watch you guys kiss,'" he recalled. "I'm sorry about that, guys."

Watson then added: "Everyone wanted to be on set for it. 'Cause everyone was like, 'This is gonna be good, guys'."