The world went completely crazy last month when Keanu Reeves made his first public appearance with long-term girlfriend, Alexandra Grant.

Now, most of us didn't even realize that the actor was in a relationship, so it was very exciting to see him hand-in-hand with the LA-based artist on the red carpet at the LACMA Art+ Film Gala back in November.

And, ever since their appearance, Keanu fans far and wide have been doing some serious online stalking of the artist who, luckily for us, has a very active Instagram account.

But the main thing people noticed about Grant wasn't her artwork or her Instagram account... But her grey hair. In Hollywood, it's unusual to see a woman rock her natural hair color, so it was incredibly refreshing, to say the least.

But why doesn't she dye her hair, like most women her age do? Well, now she's spoken out, and her reasoning behind her lack of hair dye isn't what you'd expect...

Born in Beirut, Lebanon, in 1964, Keanu Reeves is a Canadian actor.

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He currently resides in the Hollywood hills after gaining fame in an impressive range of massively successful movies.

He first rose to fame in a pretty unlikely franchise.

Bill & Ted's Excellent Adventure (1989) told the story of two slackers travelling through time. It was so successful that it was followed by a sequel: Bill & Ted's Bogus Journey in 1991.

But Reeves has never stuck to just one genre.

In 1992, he starred in Gothic horror-romance, Bram Stoker's Dracula - although his performance in this rather overblown movie has been pretty much universally panned.

Reeves is perhaps primarily known for his roles in action movies.

He starred in buddy-cop thriller, Point Break, in 1991, alongside Gary Busey and Patrick Swayze. It was a commercial smash and went on to garner a cult following.

He continued this trend in 1994's Speed.

The suspenseful thriller told the tale of a rigged bus that would explode if it slowed down. Reeves starred alongside Sandra Bullock and Dennis Hopper, but has since shaded the film by refusing to star in the sequel. His reason? "The movies I wanted to make were movies I wanted to see." Ouch.

But there's no doubting where Reeves gained most of his fame.

His role as Neo in The Matrix franchise is what really made Keanu Reeves into a household name. The movies are still thought of as touchstones within the science fiction genre.

But Reeves isn't just an actor.

He's also a talented musician and spent many years playing bass for alternative rock band, Dogstar, in the '90s.

There are many strings to his bow.

He's made a name for himself particularly because of his versatility, playing leading men, brooding heroes, and goofy losers with equal panache.

But aside from his professional achievements, Reeves hasn't had such an easy life.

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He's faced a life that one wouldn't wish on their worst enemy. First, he and girlfriend, Jennifer Syme, suffered a tragic loss when their premature baby was stillborn in 1999.

But that wasn't the end of his heartache.

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Soon after this tragedy, in 2001, Syme crashed her car into three parked cars and was thrown from the vehicle, dying instantly.

But Reeves hasn't let this tragedy make him bitter.

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Instead, he's become an incredible philanthropist. He's well known for supporting a wide range of charitable causes, from PETA to Stand Up To Cancer.

And that isn't all.

It was recently revealed that Reeves gave all his profits from the sequel from The Matrix to the crew. And he didn't even want credit for it, saying, "I’d rather people didn’t know that. It was a private transaction. It was something I could afford to do, a worthwhile thing to do."

Reeves has been fairly quiet on the acting scene in recent years.

But that's all set to change in coming months as Reeves will be starring in the third part of the John Wick franchise, Parabellum, out this month.

But, in spite of his fame, Reeves is known for being fairly private.

In the past, he was always less-than-eager to take part in interviews and was known by the press for being a little difficult to deal with.

He's also kept his private life very private.

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Including what's going on with him romantically. Until now, that is. Because last night, Keanu walked the red carpet at the ACMA Art + Film Gala, and he wasn't alone.

For the first time ever ...

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Reeves made a public appearance with his long-term girlfriend, Alexandra Grant (who looked totally gorgeous, by the way).

According to reports, Grant and Keanu met in 2009.

And at first, their relationship was strictly professional, with the two collaborating on a range of different works.

Grant is a full-time visual artist.

And a super talented one at that. Her Instagram page is filled with beautiful images she's created. We knew Keanu would pick a good'un.

And, even cuter?

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Reeves and Grant have acutally collaborated on some creative projects together. This includes the 2011 "grown-ups picture book" Ode to Happiness, written by Reeves and with illustrations by Grant.

The couple actually has a range of ventures together.

via: X Artists' Books

They run a small press called X Artists' Books, which they describe as "a small publisher of thoughtful, high-quality, artist-centered books that fit within and between genres."

But also, just look at them.

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This is one of the cutest couples we've ever seen - and it seems the internet agrees. Images of the two being generally adorable are cheering everybody up.

But now the internet has some questions.

We want to know who this mysterious lady is who has captured Keanu's heart!

And luckily for us ...

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Grant has a pretty active Instagram page, which has offered us internet detectives some of the info we're craving. Aged forty-five, Grant was born in Ohio, but grew up in Mexico, Spain, and France.

Grant attended Swarthmore College.

And she graduated in 1994 with a BA in History and Studio Art. Here, Grant poses with her mother in a throwback shot.

Grant is now based in Los Angeles.

And her artistic ventures are varied. Primarily known for her paintings, Grant also works with poetry, sculpture, drawing and even filmmaking... And she's a huge success in her many fields. Grant has held exhibitions in a range of prestigious locations, including the Los Angeles County Museum of Art, the Galerie Gradiva in Paris and The Harris Lieberman Gallery in New York.

But, putting her artistic ventures aside...

There is another thing that people find so intriguing about Alexandra... And that's her hair.

Alexandra rocks a natural head of grey hair...

Which, considering that she is only forty-six-years-old and a solid LA resident, is quite unusual.

Many have been wondering as to why Alexandra doesn't just dye her hair like most other women her age...

Not that she needs to - She completely rocks her silver locks. But now, she has opened up about her hair color, and the reason as to why she doesn't cover it up.

Alexandra went grey prematurely in her early twenties...

And would cover up her natural color for years. In an Instagram post in which she shared a headline about breast cancer links to hair dyes, Grant wrote: "I went gray prematurely in my early 20's... and dyed my hair every color along the way until I couldn't tolerate the toxicity of the dyes anymore. In my 30's I let my hair turn "blonde"..."

She believes that the hair dyes were harmful to her body...

And therefore doesn't use hair dyes anymore. But she is fully supportive of women changing their hair color, just so long as they're aware of the potential effects. "I love and support that every womxn can choose how she wants to look at every age. But/and, if womxn are perishing from beauty standards... then let's talk about those beauty standards. Love to all womxn!"