Scarlett Johansson hates talking about her underwear.

The 28-year-old actress - who bagged the top spot on Playboy's 'Sexiest Celebrity' list in 2007 - labelled a recent probe into her underwear choices as the ''stupidest question'' she's ever been asked.

While the face of Dolce & Gabbana is no stranger to stripping off in front of the camera, Scarlett revealed she isn't as keen on opening up about her underwear choices.

She told GQ magazine: ''I remember a female interviewer being really interested in what kind of underwear I wore under my outfit in 'The Avengers'. At first I was giving her sort of, 'Well you'll just have to wait and see type answers.' But eventually I was just like, 'You've got to be f**king kidding me.' ''

Although she is renowned for her stunning appearance, the blonde bombshell - who is currently staring with Joseph Gordon Levitt in 'Don Jon', the story of a porn fanatic tackling his addiction - also admitted she isn't worried about growing old in the industry.

When asked if she was concerned about turning 30 the following year, the 'Vicky Cristina Barcelona' star replied: ''No, I don't think so. I look forward to ageing gracefully. I wouldn't want to go backwards.

''I'm looking forward to what the future holds.''