Rachel Bilson: Happy Mother's Day!

Rachel Bilson spends some bonding time with sex therapist mom Janice Stango at LAX airport in Los Angeles on Wednesday.

Other pictures include Rachel (in Calvin Klein) holding hands with BFF actor Hayden Christensen at the Costume Institute Gala held at NYC’s Metropolitan Museum of Art. Awww!

Don’t forget — Mother’s Day is this Sunday, May 11. Get your mamas something good!

15+ pictures inside of Rachel and Hayden looking like a cute couple…