Ethan Hawke marries his pregnant former nanny!

What is it with nannies?

The close proximity, the maternal aspect, the more subservient surrogate wife stuff?

In 1989, Robin Williams married -- and was recently divorced by -- his nanny, Marsha Garces.

Rob Lowe swears he had nothing to do with his nanny, Jessica Gibson. Neither did his wife, Cheryl Lowe. And I tend to believe them.

Jude Law actually admitted he dallied with his nanny when he was engaged to Sienna Miller.

Now Ethan Hawke has married his former nanny. Three weeks ago, according to People. Which is nice since Ryan Shawhughes is pregnant with their daughter. But don't go hating. Word is they got together after his wife Uma Thurman left him. No, really.

Ethan definitely beat Uma to the punch, er, altar. She just got engaged to Swiss gabillionaire Arpad "Arkie" Busson, who can probably afford a slew of nannies.

Uh-oh.

Photos: Ethan and Uma at the 2002 "Chelsea Walls" premiere party in Los Angeles.