In love, age is truly just a number -- even for Hollywood stars!

Twitter was certainly shaken when Keeanu Reeves attended LACMA Art + Film Gala holding hands with his new girlfriend, Alexandra Grant. Some of the nasty netizens poked fun at Keeanu for allegedly dating an older woman (which is actually not true as Alexandra is 46 and Keanu is 55).

Still, had Reeves chosen to date an older woman, that would not be entirely bizzare. After all, there are a lot of big-name male stars who have a dated women older than them.

Want proof? Here they are!

Ashton Kutcher

It's hard to tell whether it's the "Punk'd" star who fell head over heels with Demi Moore or it's the other way around. Moore recently opened up about her addiction to Kutcher.

They were married for eight years before divorcing in 2013.

Moore recently dished ex-husband Kutcher over threesomes and cheating. However, Kutcher declined to speak ill of his ex-wife out of respect because she is a mother.

Jason Momoa

The "Aquaman" actor was just eight when he kindled an affection for actress Lisa Bonet, who is 18 years his senior. He could not forget the woman he saw on TV, grew up to be an actor, and later married her.

Aaron Taylor-Johnson

Marrying the "Fifty Shades of Grey" director -- who is 23 years older than him -- got the "Avengers: Age of Ultron" Quicksilver actor his fair share of boy-toy comments.

However, for Sam Taylor-Johnson, getting married to a younger guy works better and lasts longer than her friends' marriages to men their age.

Hugh Jackman

The "Wolverine" actor is off-limits to women for over a decade now. It was on the set of the TV drama "Corelli" in 1995 when Jackman met his wife Debora Lee-Furness.

"I had a massive crush on her instantly," gushed Hugh, who proposed to Debora just 3 and a half months after meeting her.

Why Older Women are Good for Younger Men

In the book "Older Women, Younger Men: New Options for Love and Romance," author Susan Winter revealed that older men are used to being in control of their women, whereas younger men are more likely to treat women equally.

Millennial men are said to be attracted to successful women whom they could conquer the world with together. Older women are also less keen to play around and want something real.

For older women, it is also to their advantage to date a younger guy who most likely will not be divorced yet or have issues with sexual performance.

READ MORE: Keanu Reeves: Relationship Timeline of the 'John Wick' Star