Taylor Lautner kept things brilliantly simple when he turned up at the bash in Los Angeles on Saturday night.
The 24-year-old star transformed himself into Olympic gold medallist Ryan Lochte by spraying his dark hair silver like the Rio 2016 US swim-team star's trademark tresses.
He pulled on a red, black and blue warm up jacket unzipped to reveal his chest, black sweat pants plus red sneakers.
The Scream Queens actor completed his costume with two gold medals around his neck and a pair of black swim goggles.
The look was pure Lochte - and comfortable for the evening as well.
He joined a host of celebs at the splashy event.