For years, Kristen Stewart resolutely tried to keep her private life out of the public eye.

Now, though, the actress says that she has decided to share her relationship experiences with the world as an opportunity to “make even one other person feel good about themselves”.

Stewart was in a long-term relationship with her Twilight co-star Robert Pattinson but the couple broke up in 2013. Then last year, Stewart came out as gay.

In an interview with The Sunday Times, the 26-year-old, who stars in Olivier Assayas’s latest film Personal Shopper, a ghost story set in Paris, said: “I wasn’t hiding anything […] I didn’t talk about my first relationships that went public because I wanted things that are mine to be mine.

“I hated it that details of my life were being turned into a commodity and peddled around the world.

For all the critical acclaim, however, Stewart is unwilling to dismiss the Twilight saga films, which grossed nearly $3.4 billion at the box office, and which Stewart says “shaped her enormously”.

“I don’t view the whole Twilight blow-up as being generally traumatic,” she said. “It would take someone with a really unhealthy amount of ego to be upset that everyone doesn’t love them.

“It would be silly to say I don’t care what people think of my work and who I am, but stuff is polarising, period.”