Jessica Biel says she is “fearful in a very vain manner” about her changing body and the iprocess of aging.

“I feel my knees changing – like, why do I have this pain when I’m running on the treadmill? What’s going on with my lower back when I wake up in the morning? I just feel changes,” the 26-year-old actress says with an air of doom in the November issue of British Marie Claire UK.

She continues: “And I’m definitely fearful in a very vain manner about my body aging. I think it’s freaky weird to look at a picture of your grandmother when she was a young woman and look at her now.”

Although growing older frightens her, there will be no plastic surgery for the future Mrs. Timberlake: “I am really afraid of blades on my face. That freaks me out beyond belief. I would way rather have wrinkles than have some slice-up going on.”

“I tell you, I have so many friends having babies and getting married, and they just want to put me where they are so we can go to nursery together,” she says. “I’m like, ‘Noooooo!’ I’m resisting.’”