Olivia Wilde, Rachel Bilson, Baby2Baby Gala

Charley Gallay/Getty Images for Baby2Baby

Where's Seth Cohen?

Olivia Wilde and Rachel Bilson had a mini The O.C. reunion on Saturday night. The actresses both attended the 2018 Baby2Baby Gala Presented by Paul Mitchell in Culver City, Calif.

Wilde, who starred as Alex Kelly on the hit series, and Bilson, who starred as Summer Roberts, joined celebs Jessica Alba, Katy Perry, Kobe Bryant, Zoe Saldana, Judd Apatow, Julie Bowen, Jenna Dewan, Jennifer Garner, Leslie Mann, Busy Philipps, Kelly Rowland, Rachel Zoe, Zooey Deschanel, Lauren Conrad and Olivia Munn at the star-studded event, where guests sipped on Tequila Don Julio 1942 cocktails.

Amy Adams was also in attendance at the event, during which she was honored with the "Giving Tree Award," which the organization awards annually to a mother who uses her position in the public eye to advocate on behalf of children living in poverty.

The seventh annual Gala raised more than $4.3 million to support its work providing low-income children with all the basic necessities that every child deserves.  

Take a look below to see more of the celebs in attendance at the 2018 Baby2Baby Gala!

Amy Adams, Baby2Baby Gala

Tommaso Boddi/Getty Images for Baby2Baby

Jennifer Garner, Baby2Baby Gala

Tommaso Boddi/Getty Images for Baby2Baby

Jessica Alba, Baby2Baby Gala

Stefanie Keenan/Getty Images for Baby2Baby

Zoe Saldana, Baby2Baby Gala

Stefanie Keenan/Getty Images for Baby2Baby

Lauren Conrad, Baby2Baby Gala

Tommaso Boddi/Getty Images for Baby2Baby

Busy Philipps, Baby2Baby Gala

Tommaso Boddi/Getty Images for Baby2Baby

Jenna Dewan, Baby2Baby Gala

Tommaso Boddi/Getty Images for Baby2Baby

Katy Perry, Baby2Baby Gala

Stefanie Keenan/Getty Images for Baby2Baby

Olivia Wilde, Rachel Bilson, Baby2Baby Gala

Charley Gallay/Getty Images for Baby2Baby

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