Ruth Jones has revealed she is resigned to playing supporting roles.

The curvaceous Gavin and Stacey actress is about to star in BBC4 drama Hattie about the life of Carry On actress Hattie Jacques, but told The Independent she doesn’t expect many lead roles to come her way.

Ruth said: “My ambition is always to play parts that are different and are a challenge. However you have to be realistic and I know that I’m never going to play Juliet… I will probably always play the nurse.”

The Welsh actress and writer had her breakthrough in ITV series Fat Friends about a slimming club, and has had supporting roles in comedies Nighty Night and Little Britain, and costume dramas Little Dorrit and Tess of the D’Urbervilles.

She said: “I’ve been very lucky so far. I can’t say people are knocking down my doors to play overweight Barry girls, because they’re not.”

But Ruth is currently working on Stella, a comedy for Sky she has written and will star in about a 40-something mother, which she describes as ‘an authentic slice of the working-class Welsh valleys’.

The award-winning comedy writer confessed: “All my life I’ve had this belief that other people are better than me. It’s only now that I’m starting to realise I’m all right, that I’m not bad at what I do.”