Amanda Seyfried gets fashion advice from boyfriend Dominic Cooper.

The stunning actress admits she's quite casual when it comes to style and relies on her 'Mamma Mia!' co-star to help her look good.

She said: "I love Stella Mccartney and Alexander Wang. But I'm more likely to buy leggings than an elaborate low-cut piece. They both make casual clothes that have something extra going on, which is what I want. I also like Calvin Klein and I love Prada bags. Actually, Dominic bought me a gorgeous bag. He knows a lot about fashion. He's very stylish."

Amanda looks good in most designer clothes as she is blessed with an enviable figure but says she has to work hard to maintain it.

The blonde beauty told LOOK magazine: "I love to work out. I like it when my body is tight and when I feel good. I've been doing it since I was young and I have a big obsession with exercise and wellbeing. I guess it was always in me, but there's pressure to be a certain way, regardless of my profession. Nobody ever makes me think about losing any pounds, but I don't weigh that much to begin with as a I have a small frame."