The American Hustle actress lost in the Oustanding Best Supporting Actress category to Lupita Nyong'o but Jen didn't seem phased by her competition when she ran into her on the red carpet.
In fact, she looked completely overwhelmed to meet the actress.
J. Law, clad in a strapless sparking Dior column gown that showed her "armpit vagina," also couldn't contain her excitement when she bumped into Cuba Gooding Jr. at the SAGs.
Unlike at the Golden Globes, the 23-year-old attended the awards without her boyfrend Nicholas Hoult, who was promoting his movie at the Sundance film festival that same weekend.
But despite being dateless, it sure looks like Jen had a great time, since her movie took top honors. Check out our gallery of her funniest faces from the night!