“People shit and eat, and they drink,” she says matter-of-factly. “We want to see the entirety of their experience.”

She gets to kiss two men in the movie (played by Fra Fee and Dermot Murphy). And Anna Paquin in Tell it to the Bees. Fess up, Holliday, which of them was the best kisser? She laughs. “It sounds like an actor-y answer, but I just don’t know, because when I’m in the moment I’m in the moment. Did Dermot and me kiss? Oh, yes, we did. There was a version where we weren’t going to, but it felt a bit weird. And way kinkier than it should be.”

What she loves most about Animals, she says, is its portrayal of the relationship between Laura and Tyler. “The book and the script are so non-judgemental. And I think that’s what allows it to be so complex. Because you can get all the flaws and insecurities of the two girls individually and within the friendship, and the controlling and manipulation and compassion and warmth. You see all those different colours

“And to have a female friendship- portrayed so richly on screen is quite rare and is really unrepresented compared to how important it is to so many people. Most women I know have very close female friendships. It’s one of the most important relationships I have in my life.”

The first thing I ask Holliday Grainger is how many times people sing Madonna at her on a daily basis? “Not often enough! Only about once a month. I sing it as my own theme tune.” I’ve only been in the room about 30 seconds and she starts singing to me: “Holiday, celebrate …”

Grainger was brought up in Manchester. In Didsbury, to be precise. (“Quite posh,” she says.) She spent her time doing ballet and horse riding and taekwondo. It’s only now she says that she’s beginning to realise how much her single mum did for her.

“When my mum was my age, she had a six-year-old daughter so not only was she working, she was chaperoning me on film sets. It’s hard enough doing my own work.’ You realise how many opportunities my mum has given me, and she made it look so easy.”

Since starting at six you could say she has never not acted. It has become a job of work now, she says. But that’s fine. “It’s not as carefree as it used to be when I was younger. But at the same time, it is more interesting.”

That’s down to the range and variety of roles she is getting now. The thing that slightly bothers her about acting is the sense that things can be out of your control. That and sometimes a sense of being infantilised, “especially when you’re followed to the toilet and timed.” She could do without that.

Do you feel grown up, Holliday? “I don’t. Is there a point where you are supposed to? I’m still getting there. Does grown-up come with independence? With financial security and making your own home? I suppose that helps make you feel a bit more grown up.”

You’ve ticked all those boxes? “I guess so.”

To quote Animals again, is 30 hurty? Maybe a little, she says. “I’m coming around to it now. There’s a novelty to turning 30. And then you realise you’re in your thirties. ‘Oh shit.’

“People do treat you differently,” she adds. “I’m no longer the little girl. Or maybe it’s come with the #timesup movement and awareness of equality. That coincided with me turning 30.”

Because of that, things are shifting in her profession, she thinks. Are they shifting fast enough, though? “You do sometimes think, ‘Is this just a fad?’ Is this just a conversation point and it will be brushed over and we’ll move on? But I don’t think so. We’re seeing way more diversity and equality on film sets now.

“I think where there is gender equality within roles on film sets that will lead to more empathy and a more inclusive working environment.”

As it is, she says: “I think it’s been a wake-up call to people to remind them that being blind to it isn’t an option. Everyone has to be active in disallowing it.”

A few other things I learn about Holliday Grainger. These days she divides her time between London and Manchester. She’d like a pet. “I always get a pang of jealousy when I see people with dogs.” Filming Tell It to the Bees she drank all the diet Irn Bru in the fridge in her apartment (previously she hadn’t even known it existed) and the odd glass of Edinburgh Gin. She can do a good Scottish accent, she says, but she’s not sure it’s the sexiest accent. “Depends who’s talking. Irish is up there.”

She does yoga and lifts weights. She can crack her little fingers and is good at climbing trees. She is veggie-stroke-vegan and thinks Cate Blanchett, who she acted with in Kenneth Branagh’s 2015 take on Cinderella is amazing. “She’s beautiful, talented and makes it all look easy.”

As for herself? If any directors are reading, she’d quite like to do an action movie. “I really enjoy the action scenes. I like to be physical. Stunt driving is great, so, maybe something more of that.

“I’m probably just about ready to step back into a corset again. It’s been enough years. But I haven’t done enough comedy and I think that’s quite difficult and I think you should always do what you’re scared of.”

It’s hard to imagine she’s scared of anything.

Tell It to the Bees is in cinemas now. Animals goes on general release on August 2.