For future reference:
Actors of fully Jewish background: -Logan Lerman, Natalie Portman, Joseph Gordon-Levitt, Mila Kunis, Bar Refaeli, James Wolk, Julian Morris, Esti Ginzburg, Kat Dennings, Erin Heatherton, Odeya Rush, Anton Yelchin, Paul Rudd, Scott Mechlowicz, Lizzy Caplan, Emmanuelle Chriqui, Gal Gadot, Robert Kazinsky, Melanie Laurent, Marla Sokoloff, Shiri Appleby, Justin Bartha, Adam Brody, Sarah Michelle Gellar, Gabriel Macht, Halston Sage, Seth Gabel, Alden Ehrenreich.
Actors with Jewish mothers and non-Jewish fathers -Jake Gyllenhaal, Dave Franco, Scarlett Johansson, Daniel Radcliffe, Alison Brie, Eva Green, Emmy Rossum, Jennifer Connelly, Eric Dane, Jeremy Jordan, Joel Kinnaman.
Actors with Jewish fathers and non-Jewish mothers, who themselves were either raised as Jews and/or identify as Jews: -Andrew Garfield, Ezra Miller, Gwyneth Paltrow, Alexa Davalos, Nat Wolff, James Maslow, Josh Bowman, Ben Foster, Nikki Reed, Zac Efron, Jonathan Keltz.
Actors with one Jewish-born parent and one parent who converted to Judaism -Dianna Agron, Sara Paxton (whose father converted, not her mother), Alicia Silverstone, Jamie-Lynn Sigler.