LYNN Kennedy is clearly not a young lady who likes to blow here own trumpet.

It's more than half an hour into the chat before the East Kilbride-born actress reveals she's set to star in a summer blockbuster movie, Macbeth, starring Hollywood's hottest talent, Michael Fassbender.

Lynn will play one of the Witches, a delicious role which allows for the darkness to flow from every pour, lots of hubble, bubble, toil - and especially trouble.

"I can't quite believe I'm in the movie," she says, her voice registering the disbelief she felt last year when offered the role.

"When my agent told me I was set to go to an audition for Macbeth I presumed it would be a stage production. I had absolutely no idea he was talking about the film starring Michael Fassbender."

Lynn had sent off a pre-audition video, the producers - See-Saw Films who were behind Oscar-winning The King's Speech - clearly liked what they saw.

"It will be amazing to see the final result," she says of the summer release. "It's been great to watch Michael work and for me a great challenge."

The challenge facing Lynn this week is rather different from Shakespeare's tale of betrayal and revenge.

The actress stars alongside Daniel Cameron and Ross Mann in the latest Oran Mor offering, Lifesaving, appearing as a fifteen year-old girl.

Writer Rob Dummond's lunchtime play tells the story of Sandra and Jamie, a sister and brother who have run away from home.

We discover Jamie, who is near mute, 'has done something bad', and Sandra has vowed to look after her little-big brother.

"The pair take off to the countryside and they live in a tent," says Lynn. "It's there they come across the third character and the storyline and the drama begins to reveal itself.

"And I've really loved the rehearsal period. This is a really good part for me."

It's certainly demanding. Because her brother can't/won't speak, Lynn doesn't get vocal responses.

"It makes it a real test," she says of the process. "It makes you really aware of how you have to present your questions. But I can honestly say I've really enjoyed being part of it all."

Lynn didn't grow up with dreams of becoming an actor. She wasn't part of the East Kilbride stage-struck kids' network such as Blythe Duff or Julie Wilson Nimmo, little ladies who were compelled to perform.

"No, instead I had an idea I'd like to become a vet," she says. "I had this cosy idea it would involve looking after cute little kittens, but I'd sort of failed to realise it can be a lot darker than that. At times you have to put animals down.

"And on top of all that I was rubbish at maths and chemistry at school. Being a vet just wasn't going to happen."

What to do? Lynn left school and took a job in Glasgow soap shop, Lush.

"It was there I met a co-worker who told me about evening acting classes at Strathclyde University. And as it was at a time when I was looking for something to do so I went along, and I loved it."

Lynn had been painfully shy at school. But the acting classes brought out the more forthcoming side of her personality. And buoyed by the experience, she applied for drama school.

"I figured if I got in I'd have a go at acting," she says, smiling of leaving her life to fate. "And I did. And while the world was strange at first, I really enjoyed it. I'd be rolling around on the floor or whatever and smiling. It was such a change to my life."

From RSAMD, Lynn landed an internship at the Citizens' Theatre, appearing in roles such as Cordelia in David Hayman's King Lear.

"It was a great chance to watch and learn from great actors," she says.

Now, Lynn can smile at the demands and delights of the business, of switching from fifteen year-old schoolgirl to fully grown-up Witch.

But how did she come to inhabit her witchy character? Who did she channel in order to achieve the right level of evil? A nasty school bully? A horrid teacher?

"I didn't have to channel anyone," she says, laughing.

"Just having to get up at four am to be on the film set was enough to bring out the witch within."

* Lifesaving, Oran Mor, until Saturday.