The event was held at the Hollywood Hills home of Balthazar and Rosetta Getty, who also were the hosts. The party had a pink theme and guests were served sushi, sliders, beet salad and mixed veggies.
Moore’s daughters Rumer, 22, and Scout,19, also attended.
“The party was very small and intimate,” a source tells People. “Ashton and Demi looked happy and totally unaffected by recent relationship rumors. James and Kim were glowing. Despite being about to burst, Kim looked amazing.”