Congratulations, Claire Pettibone!

When Facebook founder Mark Zuckerberg married Priscilla Chan in a surprise (at least to people who aren’t family and friends—FB or otherwise) ceremony, the bride wore a gown designed by Los Angeles designer Claire Pettibone. Hat tip to Racked for the photo above.

InStyle has some fun facts on the dress, including the designer’s dish that the dress is already in hot demand by stores nationwide. The gown is Pettibone's "Sky Between the Branches" style. Here's a look at the dress on the runway.

On Pettibone’s blog, the designer shares how she learned Chan wore her design:

“My husband Guy is checking the day’s news on his phone while I am about to drift off… ’HONEY! Mark Zuckerberg…the Facebook guy’ yeah? ’He got married today, and the bride…the bride…the bride…’ Yeah? WHAT?!! ’She’s wearing your gown, look!’

Congratulations all around!