But rest assured, the 45-year-old actress gets by with a little help from her friends, i.e. some really good beauty products.
In fact, they're so good, Aniston's fiancé, Justin Theroux, has trouble sticking to his side of the sink.
"It's hysterical. What product doesn't he try to hijack?" the Aveeno brand ambassador laughed during an exclusive interview with E! News' Catt Sadler. "He's good to his skin, that's for sure. It's always, 'what are you using, what is that?' It's cute."
"He does have good skin," Sadler said of Aniston's longtime beau, who popped the question in the summer of 2012. .
And Aniston agreed that Theroux has a pretty fine face, with a beard or without.
"He's got gorgeous skin," she agreed. "Perfect skin."
Aniston said that she also shares the Aveeno love with friends, such as close pal Chelsea Handler. "I always share, especially with Chelsea," she smiled.
The We're the Millers star, who snagged an MTV Movie Award nomination for Best Female Performance for her role as a smokin' hot stripper-turned-small-time pot smuggler in the raunchy comedy, says that her all-time favorite Aveeno product has to be the Daily Moisturizing Lotion.
But it turns out, Aniston wasn't always so kind to her skin, as the onetime sunbathing fan readily admitted.
"The sun, I feel, is like my friend I've had to say goodbye to," she said ruefully. "I was terrible as a kid. It was baby oil [that she rubbed on her body]...I mean, we all did it."
Even now, she "would love to say" that she always wears sunscreen, "but that would be a lie."
We appreciate the honesty—it's tough to stick to the ole regimen every day!
But moving on to that famous hair of hers, Aniston said that her mane man, Chris McMillan, "is always yelling at me to stop coloring my hair—and to cut it. So that's his fault."
Well, she must trust his advice, because she did step out with a chic long bob in November. Asked whether he might want Aniston to go Miley Cyrus-short, she just said, "He likes to cut it. He's a hair-cutter." (Aniston is a Spokesperson and Co-Owner for Living Proof hair products.)
Aniston will continue to share the Aveeno love Monday at 12:01 a.m. when the mini-movie "The Beauty of Nature," narrated by Aniston, premieres on YouTube.
"It was actually to educate people and inform them on what goes into the product," she explained. "For me, I've been using [Aveeno] for so many years, since I was a teenager and it just always worked."
As for the video, "it's so mini it's actually a minute-and-a-half mini," she laughed. "I don't know what festival would take that short of a film."