Top Doc WARNS Courteney Cox: STOP the Drastic Plastic!

“Cougar Town” cutie Courteney Cox is set to say “I do” to rocker Johnny McDaid – and sources say she may be preparing for the big day with more plastic surgery!

But friends, as well as medical experts, fear the former “Friends” beauty – who just turned 50, while her fiancé is 37 – may be going overboard if she does.

“Courteney is looking more and more plastic,” celebrity plastic surgeon Dr. Anthony Youn, who has not treated the actress, told The National ENQUIRER.

“It appears that she’s had a good amount of Botox injections to smooth her forehead and crow’s feet, as well as injections of filler like Juvederm in her lips and cheeks.

“To me, she looks a tad overdone. I’d recommend that she lay off the injections for a while.

“She’s such a natural beauty that less is more for her in terms of plastic surgery.”

Courteney announced her engagement to Irishman McDaid, a member of the alt rock band Snow Patrol, on Twitter on June 26.

They’ve dated for about eight months, and McDaid whisked her off to Turks and Caicos to celebrate her 50th birthday on June 15.

In an interview last year, Courteney – who has a daughter Coco, 10, with ex-hubby David Arquette – admitted hitting the big 5-0 was “gonna be brutal.”

She added: “My biggest fear is that it catches up to you so quickly. It’s almost like you wake up and you’ve changed. You can be rocking along in your life and then it just happens.”

The “Scream” star has admitted to getting Botox and laser treatments, and insiders say she’s now focused on looking great for her wedding day.

“Courteney is desperately trying to hold back Father Time,” said a close source.

“She’s very conscious of how she looks, especially next to Johnny.”