The 25-year-old actress, who is the face of Spanish fashion label Mango, knows looking good can take hard work but says it's worth it in the end, Hello magazine online reported.

"When I was little my mum always said, 'Pain for beauty.' That made me realise that, although the process of getting ready for an event is tedious, in the end it's worth investing the time to have the look you're happiest with," Johansson said.

The star who is famed for her old-school glamour look also says it's important to dress in outfits that you feel comfortable in, not whether they're in fashion or not.

"I think the most important thing is to look comfortable in yourself and in your own skin, whether you're wearing something crazy, high fashion or casual. As long as you own the look, that's the most important thing," she said.

While she loves clothes, Johansson admits to being a shoe addict.