Donna Mills has revealed the one thing she won't do on OnlyFans.

The Knots Landing star hit headlines worldwide when she joined for the adult website aged 85 in order to "engage with fans in a more meaningful way" but Donna has explained there's one request she won't fulfil for her subscribers - insisting she won't take any money for brushing her teeth on camera.

She told ABC News: "Just, you know, they're the things of everyday life: having a cup of coffee, you know. They say they like it when you brush your teeth. I'm not going to brush my teeth."

However, Donna is happy to share videos which show her working out on her Peloton exercise bike as she convinced pictures are sexier if they leave a bit of mystery.

She said: "I think it's sexier to be not just totally naked, you know. Have a little imagination about it. One of the pictures in Playboy, which I think is one of the sexiest things, is me in the shower, in a dress."

Donna also recently admitted she's agreed to fulfil one "wild" request for her to film herself stomping on grapes.

She told Entertainment Tonight: "Somebody wants me to film or film myself stomping the grapes."

The interviewer then asked: "So they want to see your feet? They want to see the toes." To which Donna replied: "Yeah, I guess so. There are a lot of people out there who are turned on by toes, I guess."

Donna's foray onto the saucy side of the Internet has proved a success so far as it was recently revealed she made "many six figures" in the month since joining OnlyFans.

When Donna appeared on the Creators Inc podcast, which is produced by the OnlyFans management company of the same name, host and CEO Andy Bachman said: "You're working with Creators Inc., and I can say that you are doing incredibly well. Many six figures, and it's been early."

The veteran actress admitted fans have enjoyed being "invited in" to her life in a much more intimate way than ever before.

She said: "They want to know me. They want to know what I do during the day when I'm home. They want to see my home. They want to know much more about my personal life than we ever experienced back in the '80s and the '90s that, you know, the fans were cut off from."