From PEOPLE Magazine Click to enlarge
The Best Actor nominee took sister Mandi (left) and mother Donna. (Girlfriend Rachel McAdams was at work on her next film.) Joked his mom: "This shows you what a good boy he is."

Though Jay-Z joined his dream girl at the Golden Globes Jan. 15, he stayed at home in N.Y.C. for the Oscars, so Beyoncé enjoyed the show with her manager-father Mathew.

In keeping with the Oscars' green theme, Dunst recycled her 2005 date: younger brother Christian. Before they hit the carpet, big sis—lately seen getting close with Strokes drummer Fabrizio Moretti—straightened Christian's tie.

Up for Best Actor, DiCaprio went with his awards show go-to girl: his mom, Irmelin. Later he met up with his model girlfriend Bar Rafaeli at Prince's after-afterparty at Teddy's, where they slow-danced at 5 a.m. to "Sexual Healing," their foreheads pressed together and his arms wrapped tightly around her.