Kate Beckinsale says she has suffered insidious bullying from internet trolls who accused her of secretly going under the knife.

In an emotional Instagram post over the weekend, the Underworld star, 50, called out social media users who speculated shed had cosmetic surgery done.

I hate talking about this because I hate adding to this conversation but Im doing it because insidious bullying of any kind over time takes a toll, she began her lengthy post, alongside a throwback video clip of herself and a recent video from a public appearance.

Noting that shes faced plastic surgery claims since she was 30, Beckinsale continued, I am accused of having had unrecognisable surgery /using Botox using fillers /being obsessed with looking younger, and its really such a tiresome and subtly vicious way to bully a person.

The English actor said shes never been too concerned about aging; after losing her father at a young age, Beckinsdale said, she was more afraid of dying young.

I spent most of my teenage years and a good deal of my 20s absolutely crippled with severe anxiety and panic attacks that I was going to die of a heart attack too, she wrote.

Beckinsale went on to explain that her appearance has evolved due to natural aging and the evolution of makeup techniques. She then pleaded with her online critics to stop commenting on her looks.

Im posting this knowing full well that it will have absolutely no effect, she wrote. It isnt going to stop. But Im also posting it because whatever someone looks like, accusing them constantly of things they havent done, or being obsessed with youth when actually, currently Im obsessed with surviving loss, is bullying. Please stop now.

The Van Helsing star added, The fact that one of the major things I am bullied about is an assumption that I cant handle the idea of getting older is so deeply ironic when my all consuming terror was that I never thought Id even see the end of my 20s.

Beckinsales PSA comes months after she shared a photo of herself in a hospital bed in March . She did not disclose what caused her hospitalization at the time.