Mary-Kate and Ashley Olsen made another big fashion statement over the weekend.

To disguise themselves from photographers, they wore masks to the Los Angeles wedding of stylist Estee Stanley on Saturday night. Ashley Olsen was a bridesmaid.

The twins weren't the only stars to watch Stanley said "I Do!"

Making a rare public appearance together, Justin Timberlake and Jessica Biel arrived hand-in-hand, along withTobey Maguire and wife Jen Meyer, Eva Mendes, Kurt Russell and Goldie Hawn, and Office star Rashida Jones.