Aniston stunned in a black dress with a plunging neckline and a thigh-high slit, and accessorized with more than $10 million worth of diamond jewelry, according to Us Weekly. Vergara, meanwhile, turned heads in a formfitting silver gown.
"Each and every one was a cherished member of our Hollywood family, as was beloved actor and friend who left us just yesterday, Bill Paxton, all were loved and all will be missed," the star said.
Jessica Biel and husband Justin Timberlake, Amy Adams and husband Darren Le Gallo, and Reese Witherspoon and husband Jim Toth were among the other celebrity couples at the after-party. Also present were Scarlett Johansson, Halle Berry and Orlando Bloom.
Aniston and Theroux, a 45-year-old actor and star of The Leftovers, married in August 2015 after more than four years of dating. Vergara and Manganiello, a 40-year-old actor known for Magic Mike XXL, tied the knot in November 2015.