AT 68, Goldie Hawn is a glowing golden girl – and one medical expert believes she may be hiding a plastic surgery secret!

The “Private Benjamin” star looked tanned, toned and facially freshened-up after a dinner date in Hollywood recently.

The difference in her face between today and two years ago is absolutely staggering!

“Goldie looks 20 years younger than she did just two years ago,” celebrity plastic surgeon Dr. Anthony Youn, who has not treated Hawn, told The ENQUIRER.

“She’s transformed herself into a true California girl.”

Now a grandmother of five, Goldie  soared to superstardom in 1968 as the ditsy, dancing, bikini-clad blonde on TV’s “Rowan & Martin’s Laugh-In.”

She went on to win an Oscar for the 1969 comedy “Cactus Flower” and starred in a string of other hit films, including “The First Wives Club” and “Death Becomes Her.”

The talented actress has admitted to having her eyes done, and an insider told The ENQUIRER in 2008 that Goldie had undergone two face-lifts in the past. But Goldie swore off major cosmetic surgery and began seeing a dermatologist to freshen her face with Perlane, an injectable filler that softens wrinkles.

Now, it appears the mother of three grown children – actress Kate Hudson, 34, and Oliver Hudson, 37, with second hubby Bill Hudson, and son Wyatt Russell, 27, with longtime love Kurt Russell – has slipped in a quickie “tuneup,” said Dr. Youn.

“I suspect Goldie has had Botox injections to smooth forehead wrinkles and lift her eyebrows,” Dr. Youn told The ENQUIRER.

“It also appears that she’s undergone injections of a filler like Juvederm to plump up her lips and smooth her smile lines. Her skin looks pristine, which may be due to several laser treatments, such as the Syneron CO2RE system for skin tightening.”

Dr. Youn estimates the procedures cost about $8,000, peanuts for Goldie, who’s worth an estimated $60 million.

Still, Dr. Youn said: “Overall, she looks fantastic!”