Harry Styles Rings in 21st Birthday with Chris Martin, Jennifer Lawrence and Adele

Harry Styles Birthday Party with Jennifer Lawrence, Chris Martin and Adele
Harry Styles
Pascal Le Segretain/Getty

02/01/2015 AT 07:20 PM EST

Now this is one star-studded birthday!

Harry Styles brought out Hollywood's A-list to his birthday bash in L.A. on Saturday night.

On the guest list were on-again couple Chris Martin and Jennifer Lawrence, as well as Styles' new gal pal Nadine Leopold.

Others at the One Direction boy-bander's 21st birthday party included David Beckham, Adele, Adam Levine, ex-fling Kendall Jenner, Courteney Cox, Rashida Jones and fellow Brit Cara Delevingne, a source tells PEOPLE.

Styles had not one cake, but four from Hansen’s Cakes – and his happy face graced the tops, says the insider, who added that photos were not allowed at the super-starry bash.

"When he blew out his birthday candles, he FaceTimed his mom," says the source. "He was so sweet to all his guests."
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