The 51-year-old actress, known to play Monica Geller on the hit sitcom, said there is no "pressure" from Snow Patrol guitarist McDaid, 39, as he is not a fan of the "Hollywood look", reported Female First.
"It's no secret I've had some Botox in the past, but I won't go under the knife. Johnny isn't into that whole Hollywood look anyway, so I don't feel pressure to keep looking like a 20 year old for him."
"I'd rather take good care of my body with a healthy diet and exercise. I try to stay out of the sun, I eat well, I lay off carbs as much as I can and get lots of sleep."
Cox, however, said her eating regime goes for a toss whenever she dines with her former "Friends" co-star Jennifer Aniston and her husband Justin Theroux.
"Jen and I are as close as ever and we chat most days. There's nothing we don't talk about. My diet goes out of the window at Jennifer and Justin's place.