Kate Hudson, whose actual 30th birthday was Sunday, bid farewell to her 20s with a star-studded blowout birthday bash Friday night in Pacific Palisades, Calif.

Noticeably absent? Owen Wilson, the actress’ on-again-off-again beau. Not that the party — at the home of Hudson’s mom, Goldie Hawn, 63, and her partner Kurt Russell, 58 — lacked for a jaw-dropping roster of A-List guests, including Demi Moore, Ashton Kutcher, Justin Timberlake (though without girlfriend Jessica Biel), Matthew McConaughey, Tobey Maguire, Jessica Alba, Cash Warren, Gwyneth Paltrow and husband Chris Martin, Gwen Stefani, Eva Mendes, Adam Sandler, Zach Braff — even Cher. “Kate was elated, dancing all night, having the time of her life — and she looked amazing in a very sexy little dress and (Christian) Louboutin heels,” a source tells People.