"I'm 24 so there's 14 years between us. But I have always been a big kid – I think as an actor you have to be. I teach workshops to young actors and I always tell them that being an actor gives you the chance to play. In society you are always being told to be an adult and it pushes that sense of play out of you. But being an actor, particularly when you are playing the part of a child, gives you the OK to play and be a child again.
"After all if, as an adult, I went down to the park and started building a den people would probably call a doctor – but in a play you can do all of those things and it's OK to do them."
Directed by Birmingham Stage Company actor/manager Neal Foster, Tom's Midnight Garden has been adapted from the novel by David Wood whose other collaborations with BSC include The Witches and James and the Giant Peach.
But David Tute says audiences will be in for a surprise.
"Previous productions have been very minimalist and you didn't really see the garden. In our production the audience is taken on a journey. To begin with we are in this 1950's house and for a while the garden isn't there. But when the garden is revealed by theatrical magic the audience goes 'wow'. And they go on the journey with Tom. That is the best bit. When you hear them respond to the garden."
David admits that he came to Tom's Midnight Garden as an adult.
"I had not heard of the story beforehand but I have got quite a few friends who are teachers in primary school and when they found out I had the part they told me they just loved the story.
"When I got the call to go to the audition I didn't have time to read the book beforehand but I watched a television series from the 1970s. I watched as many versions as I could and then when I got the part I read the book and I read it a few times before we went in rehearsal.
"And when I read it I agreed with what everyone had been saying about it. It has got so many layers to it that it appeals to everyone in the family. You've got a family story there, you've got lost childhood, mystery.
"Because I am an only child I connected with Tom. Not that I was a lonely child but that sense of having imagination, making dens, living in pretend. All of a sudden Tom is using his imagination in this wonderful world."
"I definitely know what it means to be isolated as a child," she recalls. "When I came back from America I really hated it to begin with. I was just that weird American girl whose clothes were weird.
"Children do see that you are different. I used to play soccer in America but when I came here all the girls played hockey. They told me I either needed to learn to play hockey or go and play football with the boys!"
Luckily it didn't take long for Caitlin to settle in.
"And one of the good things about being back in England was that it got me into acting," she says. "It turned out when they did the school timetable the subjects I wanted to do didn't fit so I had to do acting."
Caitlin, now 24, is already balancing a mix of theatre and television including an appearance in Coronation Street in 2010. Having spent last Christmas playing Hatty, she is keen to return to the role.
"It is quite difficult to find shows at Christmas unless you want to do pantomime," she says. "It is really good to be in a Christmas show that people enjoy and respect. Lots of people love the book and have seen the film and so this show is something special for them.
"Growing up in America I didn't really know Tom's Midnight Garden at all as a child. I think I discovered it when I was a bit older, when I was a teenager. But I know that it means a lot to a lot of different people.
>"Hatty is such a lovely role to play because of the fact she starts the play at about seven and then she goes all the way up to about 80. It isn't that often you are able to play someone who ages to that extent."
Like David, Caitlin sees opportunities and challenges in taking up the guise of Hatty again.
"It will be good to come back to it and think about if there were any bits which you felt you didn't get quite right last time which you could do better this time," she says. "But the strange part about it is that we all got on really well last time and a lot of the cast became friends but now it will be a whole group of people who I don't know this time round. It will be strange doing the same show with different people."
Caitlin is looking forward to people's reactions.
"You can really tell the response from the audience when you are on the stage but the best part is afterwards when you are walking to the train station and you hear a child saying to their mum 'Mum, there's Hatty' and they are all excited. That is really special."
And like David, Caitlin relishes playing a youngster.
"When I am not acting I work as a nanny so I spend a lot of time with children and I pick up a lot from them. They have a real energy and a way of responding to things which you try to capture. The writing also helps. If a part is written so it really sounds like a child or feels like a child, it makes it so much easier to be that child."