Kate Hudson "gravitates" towards comfortable red carpet outfits

Kate told PEOPLE of the collaboration: "I trust that not only does she intimately know my fashion sensibility, but that she pushes me as well, and because we are so close, it makes the process of dressing up and the choices that we make a fun and easy experience.

"We both love fashion and find it one of the great artistic expressions, and we enjoy telling stories through clothes. I feel so lucky to have her as a friend and a collaborator."

However, Kate admitted the options she picks tend to be the more comfortable options, saying: "The things that I usually gravitate towards and have always gravitated towards are things that feel effortless and have a sense of ease and comfortability that allow me to move freely and express myself freely while wearing beautiful garments."

The actress added of her fashion sense: "Style evolves as one evolves, as I have evolved, but there is always the classic foundation of what I love and how I like to express myself through clothes that always finds a thread, a continuous thread, through the years."

Kate previously admitted her style was often "too casual" and she joked she used to look like a "hammerhead shark" with her preferred beauty look in her 20s.

She told InStyle.com: "In the early aughts, my outlook was almost too casual, to the point where I cared so much to be casual that I'd say, 'I'm not going to get dressed up', but I'd do just a rim of black liner and a flush of colour, and that was it - no mascara.

"I looked like a hammerhead shark because my eyes were so far apart. It was just the inner black liner. No brow, super simple."

However, Kate - who has Ryder, 21, with ex-husband Chris Robinson, Bingham, 13, with former partner Matt Bellamy, and six-year-old Rani with fiance Danny Fujikawa - "cares a little more" about her appearance these days.

She added: "But that's changed now. That was in my early 20s. Then, in my 30s, I started to want to put more effort in. I wanted to show up when I went out, put on the things I love, get my hair blown out, and care a little more.

"But I also think when you're in the mom phase, you just throw your hair in a bun, trying to figure it out as fast as possible. And now I'm back, and I'm going to take the time to put an outfit together. So, it goes through phases."