No, Jonah Hill and Beanie Feldstein are not half siblings but rather full siblings.
Jonah Hill is the older brother of Beanie Feldstein.
They were both born in Los Angeles, California, United States to Richard Feldstein, a tour accountant for Guns N’ Roses and Sharon Lyn Chalkin, a costume designer and fashion stylist.
Jonah Hill Feldstein born December 20, 1983 is an American actor, filmmaker, and comedian, while Beanie Feldstein born June 24, 1993, is an American actress. She is known for Neighbors 2: Sorority Rising (2016), Funny Girl (2022), etc.
Hill’s first leading role was in the Apatow-produced comedy Superbad.
He has since starred in several films including Knocked Up, 21 Jump Street, This Is the End, 22 Jump Street, et al.
Hill has also provided voices for the animated films Horton Hears a Who! (2008), Megamind (2010), How to Train Your Dragon (2010–2019), The Lego Movie (2014), and The Lego Movie 2: The Second Part (2019).
Jonah Hill Feldstein ranked 28th on Forbes magazine’s list of highest-paid actors from June 2014 to June 2015, at $16 million.
Jonah Hill and Beanie Feldstein had an older brother named Jordan Feldstein. Jordan died of a blood clot on December 22, 2017, at age 40 in Los Angeles, California, USA.