Nicole Richie Celebrates 35th Birthday With Kate Hudson, Cameron Diaz at ’70s-Themed Party

2 of a kind @nicolerichie @lionelrichie

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The big 3-5! Nicole Richie celebrated her 35th birthday party in style at a '70s-themed party with her closest friends and family members in West Hollywood on Friday, September 23.

The fashion designer (whose birthday was on September 21) celebrated at the star-studded disco bash with husband Joel Madden, sister-in-law Cameron Diaz, dad Lionel Richie and close pals Kate Hudson, Jessica Alba, Ellen Pompeo, Rachel Zoe and celeb hairstylist Jen Atkin.

Before heading to The Standard, Hollywood, Richie got ready for her big night with Diaz, 44, and friends Katherine Power and Jamie Schneider. Stylist Davy Newkirk helped the birthday girl achieve a picture-perfect '70s hairdo, styling her curly locks to match her stunning long gold dress.

Disco's dead.

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Once Richie and her guests arrived at the party, they skated around a roller rink and danced to tunes including Whitney Houston's "I Wanna Dance With Somebody (Who Loves Me)" and Diana Ross' "I'm Coming Out," according to Snapchat posts.

Several A-list attendees took to social media throughout the night and the following day to share photos and videos from the celebration. Alba shared an Instagram video of herself, Richie and the girls, writing, "Loved celebrating this gorgeous babe @nicolerichie #hbd #disco #lanights."

Loved celebrating this gorgeous babe @nicolerichie #hbd? #disco #lanights

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Hudson also shared a selfie with the b'day gal. "Happy birthday gorgeous! @nicolerichie #DiscoNight," she wrote via Instagram.

Earlier in the week, Madden wished his wife a happy birthday with a sweet Instagram post. "Best Mom, Best Friend, Best Wife. Happy Birthday Nicole, You keep us all laughing," the Good Charlotte singer, 37, wrote.

See more photos and videos from Richie's 35th birthday below!

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