Another Alba-Warren Wedding in the Works?

Jessica's brother tells E! he knows a bigger ceremony is in the works for later; couple tied the knot Monday

Jessica Alba is a girl who knows how to keep a secret.

The actress' brother, Josh Alba, told E! News Tuesday he was as surprised as anyone to learn his sister had swapped vows with boyfriend Cash Warren yesterday.

Especially considering he knows "they are going to do a big ceremony later."

"I just don't know any of the details yet," he said.

Perhaps taking advantage of all the hubbub surrounding Ashlee Simpson's weekend wedding bash, Alba and Warren, who are expecting their first child together this summer, quietly tied the knot Monday afternoon.