Mary-Kate Olsen, pioneer of the now-infamous ‘bag lady chic’, has joked that she learned how brush her hair last week.

The actress-turned-designer, who is newly-engaged to her partner of two years, Olivier Sarkozy, joked that her grooming skills were perhaps not as advanced as her .

Mary-Kate, a former ELLE UK cover star, told US ELLE: ‘You know, the truth is I feel like I just learned how to brush my hair, like, last week.’

Meanwhile, her twin Ashley confessed to cutting her friend’s hair, but admitted that a professional had to come in and tidy it up: ‘My friend actually also made me cut her hair the other day and that didn't look too bad either […] she made me do it, but it looks great.’

We wonder if Ashley will be in charge of Mary-Kate’s hair on her big day?

See the Olsen twins' best fashion moments here