The casts of “Barbie” and “Oppenheimer” gathered Monday at the annual Academy Award nominees luncheon alongside dozens of less famous and first-time Oscar hopefuls for handshakes, hugs, a huge group picture and instructions on nailing an acceptance speech.

The event at the Beverly Hilton is a warm, feel-good affair where nominees in categories like best animated short get to rub shoulders and share tables with acting nominees like Ryan Gosling and Emma Stone.

Greta Gerwig and Margot Robbie, whose snubs for best director and best actress, respectively, for “Barbie” caused a major stir, both showed up for the nominations they did get, and were all smiles.

She also delivered the president’s annual instructions on victory speeches, mostly urging winners to be brief and stick to the 45-second limit but also “speak from the heart,” “feel the moment” and “add a bit of humor.”

She then played a montage of past speeches that met the ideals, with clips from Jamie Lee Curtis, Brad Pitt and Ke Huy Quan.

It ended with the academy’s Platonic ideal of a speech played in its entirety: Javier Bardem’s 2008 acceptance of best supporting actor for “No Country for Old Men.” Total time: 37 seconds.