The colorful bash was held at the historic Grauman's Chinese Theatre with an after-party at the Hollywood Roosevelt Hotel.
Lily, who turns 23 today, was joined on the red carpet by her famous dad, Phil Collins.
She plays Snow White in the comical live action re-imagining of the classic fable, with Roberts as the evil queen.
The carpet was a family affair for the family-friendly film. Russell Simmons was there with his daughters. CSI: Miami star Eva LaRue brought her adorable little girl. And what premiere would be complete without Kris Jenner and her daughters Kylie and Kendall?