PHOTOS: Nicole Richie Throws Star-Studded Birthday Bash For Her Daughter Harlow

Jan. 8 2011, Published 2:45 p.m. ET

Nicole Richie and hubby Joel Madden threw a star-studded birthday party Saturday for their daughter Harlow, and RadarOnline.com has all the party pictures!

The extravaganza was held at the Tree House Social Club in Beverly Hills.

Celebs who came out to party included Kourtney Kardashian and son Mason, Gwen Stefani and her son Kingston, Ellen Pompeo and Chris Ivery brought their daughter Stella, and Jessica Alba was also snapped as she arrived.

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Looks like baby Harlow got to party hard a little early --- her third birthday isn't until Tuesday, January 11.

Nicole and Joel were married on December 11 at the Beverly Hills mansion of her father Lionel Richie. As RadarOnline.com reported, the wedding was a lavish one that included a little over 100 guests and an elephant!