Tess Christian didn't even smile during the birth of her daughter.
The 50-year-old woman claims she stopped smiling when she was 10 to fight off wrinkles.
"I don’t have wrinkles because I have trained myself to control my facial muscles," Christian told The Daily Mail, "Everyone asks if I’ve had Botox, but I haven’t, and I know that it’s thanks to the fact I haven’t laughed or smiled since I was a teenager. My dedication has paid off, I don’t have a single line on my face."
Some celebs have employed the same tactics to ward off wrinkles.
Kim Kardashian even admitted on Instagram that that is why she's not seen smiling very often.
A photo posted by Kim Kardashian West (@kimkardashian) on
Dec 29, 2014 at 1:31pm PST
Here are 11 other celebs who often keep a stoic face on the red carpet.