According to an insider, the guest list is packed with big stars, including Reese Witherspoon, Lena Dunham and Chelsea Handler. Unlike her pals, Garner's estranged husband, 45, wasn't extended an invitation for the April 15 gathering in Los Angeles.
Garner and her friends will nosh on pizza at the casual gathering, held two days before the actress' actual birthday.
“Jennifer doesn’t want gifts and has asked all her friends to help out one of her favorite charities instead,” said a source.
Meanwhile, Affleck — who’s dating SNL producer Lindsay Shookus — is filming Triple Frontier in Hawaii, where Garner and their kids, Violet, 12, Seraphina, 9, and Samuel, 6, recently visited for a family getaway.
The power pair split in 2015, and finally filed for divorce in 2017.
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