United Kingdom, Dec. 8 -- Sydney Sweeney hasn't had cosmetic surgery because she's "so scared of needles".

The Hollywood actress has dismissed rumours she's gone under the knife to change her appearance - insisting she hasn't had any wrinkle-freezing Botox injections or facial fillers because she's terrified of jabs.

In a joint interview with Amanda Seyfried for Allure magazine, Sydney explained: "Let's debunk them all [the rumours]. I mean, I have never gotten work done. I am so scared of needles, you have no idea ... "

Seyfried, 40, went on to tell Sweeney: "But it's really effective once you get older, I'm telling you right now."

Sweeney then added: "I am too scared of needles."

She went on to insist the rumours suggesting she's h...