Joan Collins and Percy Gibson in June 2023.Photo:Karwai Tang/WireImage

Dame Joan Collins and Percy Gibson arrive at the V&A 2023 Summer Party at The V&A on June 21, 2023 in London, England

Karwai Tang/WireImage

Joan Collinshas achieved several lifetime’s worth of accolades throughout her legendary Hollywood tenure, buttheDynastystaris particularly proud of a non-career achievement: her decades-long marriage toPercy Gibson.

Collinstells PEOPLE in this week’s issuethat there are a few elements that have kept her marriage going strong for so many years, and they range from shared hobbies to separate facilities.

To the actress, success lies in keeping a balance in her relationship, which she says she and Gibson have worked out to be “separate bathrooms and the same bedroom.”

“First of all, Percy and I were working together and we became great friends,” Collins, whose new memoir,Behind the Shoulder Pads: Tales I Tell My Friends, is nowavailable to purchase, explains. “We found we had a lot in common. We like the same things. We like doing the same things.”

As for what those “same things” are, Collins, 90, says, “We both adored the theater, and particularly musical theater. We love reading. We love playing cards or playing Scrabble. Neither of us are particularly outdoor[sy] people. You know, he doesn’t go running out to football games. And we love going to the theater and films and we just got along.”

Joan Collins.Ryan Pfluger/The New York Times

Joan Collins in her apartment in Beverly Hills, Calif. on Tuesday, March 22, 2022. The actress reflects on her seven-decade career, predatory Hollywood and why sometimes it’s better not to relive the past.

Ryan Pfluger/The New York Times

The combination of those mutual interests led the Golden Globe winner to conclude that she and Gibson are in “the same blood group.”

For more on Joan Collins, pick up the latest issue of PEOPLE, on newsstands Friday, or subscribehere.

When it comes to critics who have called out the 32-year age gap between her and Gibson, 58, Collins makes it known that the naysayers don’t affect her.

Joan Collins' “Behind the Shoulder Pads”.

joan collins 2023 between the shoulder pads

“They don’t do it in England anymore because everybody knows how happy we are together,” she explains. “And, you know, age is — as far as we’re concerned — just a number, and that’s the way that we both feel.”

She doubles down , telling PEOPLE, “Obviously, we talked about it before we got married, but it isn’t in the slightest importance.”

source: people.com