Kate Hudson's new buzz cut is inspired by her 13-year-old son Ryder.

The 38-year-old actress showed off her drastic new hairstyle once again when she walked the red carpet at the Urban World film festival in New York City at the weekend where her new film 'Marshall' was premiering.

Although she first sheared off her locks a couple of months back for a top secret film project that songwriter Sia is directing, Kate says she has been relying on Ryder - her child with ex-husband Chris Robinson - for maintenance tips.

Speaking to 'Entertainment Tonight', she shared: ''I copied Ryder. He had it way before, Ryder's been buzzing his head for a long time. ''Ryder's like, 'Mom, you're cramping my style. But when I did it, he was like, 'Oh my God, we actually ...' It was the first time he even could see that we looked, you know, that he looked like his mommy.''

Kate - who also has six-year-old son Bingham with her ex-fiancé, Muse rocker Matt Bellamy - is now growing her hair out, and Ryder has also decided to grow his hair like his mother.

Although she has decided to go back to longer locks, the Hollywood beauty - whose mother is Goldie Hawn - will miss the easy maintenance of her buzz cut.

She said: ''Now it's starting to grow out, and Ryder's growing his out. I do like the ease of it, you know what I mean? When I looked at the hair when it came off I was like you know this is ... I'm so happy this is gone. It was a lot of wear and tear on that.''