'How is it possible for someone to be that gorgeous?': Pregnant Kelly Macdonald gushes about Keira Knightley and husband Dougie Payne as she covers Red

She recently achieved US box office success for her portrayal of a fiery flamed haired teenage in the Disney and Pixar movie Brave.

And with the release of her latest film, Anna Karenina fast approaching, Kelly Macdonald has a lot to look forward, especially the birth of her second child.

As she graces the cover of Red's September issue, the actress spoke about how actress Keira Knightley shocked her with her flawless beauty, and how much she loves her husband.

Fiery siren: Pregnant Kelly Macdonald talks about how Keira Knightley's beauty captivated her in a candid interview as she graces the cover of the September issue of Red

Fiery siren: Pregnant Kelly Macdonald talks about how Keira Knightley's beauty captivated her in a candid interview as she graces the cover of the September issue of Red

In the drama directed by Joe Wright, which is set for release in September, Macdonald plays a character called Dolly, alongside Knightley who plays lead character Anna.

Less concerned about her role in the film, and more about Keira, Kelly told the magazine: 'I had never worked with Keira before, and she’s totally incredible.'

Comparing her to supermodel Kate Moss she continued: 'I remember meeting Kate Moss years ago, and I couldn’t take my eyes off her. Keira is like that too.'

The Scottish actress quipped: 'I kept gazing at her wondering, 'How is it possible for someone to be that gorgeous?' And she is really great fun too.'

Overwhelmed to be working with British director Wright, Macdonald admitted that she wasn't fond of her character in the film which is set in the late 19th century.

She said: 'She’s such a misery: always crying and pregnant. But I really wanted to work with Joe Wright so I knew it would be interesting.  And, actually, it was such a laugh.'

Beaming: Kelly gushes about her husband Travis bassist Dougie Payne as the couple ready their second child

Beaming: Kelly gushes about her husband Travis bassist Dougie Payne as the couple ready their second child

In love: Read the full interview with Kelly Macdonald in the September issue of Red

In love: Read the full interview with Kelly Macdonald in the September issue of Red

In August 2003, Kelly married Travis bassist Dougie Payne and four years ago she gave birth to their first child Freddie.

Without nothing but praises for her husband, she told of how she was jealous of the bond, Dougie shares with their son.

'We don’t have a nanny and Dougie is completely hands-on; I’m actually a tiny bit jealous of their relationship.  Freddie is such a daddy’s boy.'

She added: 'Dougie is the most supportive husband, he’s amazing. The best thing I ever did was bump into him.'

See the full interview in the September issue of Red on sale Wednesday 1st August 2012