In Hollywood, there seems to be an unwritten rule that older, famous men must have relationships with women who are 20 to 30 years younger.

These May-December romances are so common that they're almost laughable.

Dennis Quaid, 65, recently revealed he is engaged to Laura Savoie, 26.

Comedian Dane Cook is dating 20-year-old singer Kelsi Taylor.

And, of course, Mick Jagger, 75, is currently seeing 32-year-old ballerina Melanie Hamrick.

The heart wants what the heart wants, so who are we to judge? But it's refreshing to see a man in Hollywood date a woman his age. That's why people are pretty excited about Keanu Reeves, 55, and his girlfriend artist Alexandra Grant, 46.

Grant's work explores the use of text and language in various media, including sculpture, drawing, photography, and painting.

The two were photographed holding hands on the red carpet at the LACMA Art + Film Gala on Saturday.

People magazine confirmed they are dating. "Keanu wants to openly share his life with her," a source told People. "He is extremely happy and grateful to have Alex in his life."

Te magazine reported that the two "started dating earlier this year, but have wanted to keep it quiet."

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People are also excited that Grant feels no need to color her hair, another rarity in Tinseltown.

The couple collaborated on the books "Ode to Happiness" and "Shadows" in 2011 and 2016 — with illustrations by Grant and text by Reeves.

They've also co-founded X Artists' Books, a publishing house that focuses on publishing "thoughtful, high-quality, artist-centered books that fit within and between genres."

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In recent years, Reeves has developed quite the reputation for being a nice guy in a town full of ego maniacs.

Once reason is that he's mindful of women's personal space in photographs. Could it be that a man who has respect for women and doesn't treat them as sex objects also prefers to date people that are actually closer to his age?