For all the storyline gossip on the trio's plot, head over to our main interview with Steph.
Here, though, Soap Scoop presents some extra bonus bits from the actress, focusing on Sinead's future and more.
Are the sixth form gang all close friends in real life?
"Yeah! Some of the lads are living together at the moment - Jonny Clarke, Tosin Cole and Dylan Llewellyn. I'm really good friends with Jonny in real life, so I'll often go round there with the other girls and we'll all have a big meal together. We're like a family - Hollyoaks to me is like my second family. We all hang out together and we're really close."
Are there any more family scenes coming up for Sinead, Diane and Finn?
"I hope so! I think we're getting some stuff written for us at the moment. I really love all the family scenes at the house. Finn is funny and Alex Fletcher, who plays Diane, is like my mum in real life - or like a big sister! I'm always phoning Alex for a chat. Whenever I do a scene with Alex, it's really easy because we're so close in real life. I hope there's more of that stuff to come."
Would you like to see Finn get some stories of his own when Connor, who plays him, is a bit older?
"I'd like to see that - I think Connor can do a lot. At the moment, he's still quite young and he's got school, so it's just finding that balance between school and filming. I'd like to think he could have some good storylines coming up, because he's a talented kid. He's like my little brother in real life. Maybe he could become a proper bad boy and be the next Gaz!"
Are you sad about Victoria Atkin's departure from Hollyoaks?
"I'm gutted - she's my best friend. Me, Jonny and Vic call ourselves The Three Musketeers because we're so close. I stay in Vic's most nights and we hang out together, so we know each other inside out. When I found out Victoria was going, I literally cried every day until she left! She's staying in Liverpool for a little while, so she hasn't got rid of me that easily - we'll still keep in contact!"
Victoria did a great job with her big storyline, didn't she?
"She's an incredible actress - ridiculously good. On set, I've never met someone so professional. Everything's genuine with her - when she cried, she never used a tear stick and it was always her own tears. Out of anyone, I can definitely say with Victoria that she's going to go on to better things. I think she wants to do some TV dramas now and I think she'll be great at it - she's going to do really well."
What else is coming up for Sinead?
"I think recently we've lost a bit of Sinead's feisty side because the storylines have been quite serious, and they've been bringing the new characters in and letting the audience get used to them. Now, with the recent scripts that I've been filming, Sinead's been bringing back her cheeky comments and I'm really liking that.
"On TV, there's a few more weeks of Sinead being down but then she's going to bring back her witty side. She's got a lot in store. She's got lots of exciting storylines coming up which are going to take her on a rollercoaster - it'll be up and down!"
Who would you like Sinead to have more scenes with?
"Well, I've done some stuff with the McQueens recently and I've still got quite a bit coming up with them. I'd probably say Brendan, but I think I will actually start working with him soon. I've already had a couple of scenes with Emmett and I'd like to start working with him more. I've got a lot of stuff with the Osbornes coming up as well.
"I love working with Quinny who plays Gilly as well, but I actually can't work with him because we laugh so much! We did a scene that'll be coming out soon and it was a serious one, but I just couldn't keep a straight face. In the end, we laughed so much that we couldn't look at each other, so you'll see on TV that we're both looking away from each other!"
Is it exciting to be involved in Hollyoaks in general at the moment?
"Definitely. Before I was in Hollyoaks, it was my favourite soap. We have a lot of teenage viewers but older people watch it as well, and I think it's good for older people to watch too. I think, especially recently, the other soaps need to watch out for Hollyoaks because we're on a roll. Scan who plays Brendan is roping in all those awards, and I've been nominated for the NTAs, which I'm made up over as I really didn't expect to be nominated for that. There's going to be so much more to come from Hollyoaks this year."
What has your new producer Emma Smithwick been like to work with so far?
"I honestly think that she's the best thing that's happened to the show. She's so fresh. She's like a friend as well - she'll have a coffee with you in the canteen and chat to you, and you can ask questions very openly about your character. I think she's got some really exciting things coming up for the show. I can't wait - I think this is the most exciting time for Hollyoaks."
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