Celebrity Guys' Night Out! Leo, Tobey Maguire and Robin Thicke Are the Life of the Party at Casamigos' Halloween Bash Newly single Maguire was spotted letting loose with his longtime pal Friday night By Melody Chiu Melody Chiu Instagram Twitter Melody Chiu is a Senior Editor for PEOPLE. She has been with the brand since 2009, editing, writing and reporting across all entertainment verticals. She oversees PEOPLE's music and events coverage and has written cover stories on Taylor Swift, Selena Gomez, Melissa McCarthy, Blake Shelton and Sandra Oh. The Los Angeles native graduated from the University of Southern California and has appeared on Extra!, The Talk, Access Hollywood and Good Morning America. People Editorial Guidelines Published on October 29, 2016 11:03 AM Share Tweet Pin Email Trending Videos Photo: PG/Splash News Online;Donato Sardella/Getty These guys stick together. Nearly two weeks after announcing exclusively to PEOPLE he and Jennifer Meyer were ending their marriage, Tobey Maguire stepped out Friday for a guys’ night with his longtime friend Leonardo DiCaprio at Casamigos’ annual Halloween party (hosted by Rande Gerber, George Clooney and Mike Meldman) in Beverly Hills, California. Making a low-key arrival around 10 p.m., the star stayed incognito in a blue monkey mask and roamed through the party before meeting up with the Oscar winner after he arrived just before midnight with an entourage. “They were drinking Casamigos cocktails, having a blast and super upbeat,” says a fellow partygoer about Maguire and DiCaprio. “At the end of the night, Leo was dancing like crazy with Robin Thicke. They were cracking up the other guests.” Michael Kovac/Getty Thicke and his girlfriend April Love Geary were dressed as the title characters from Pretty Woman and also broke it down on the dance floor. Michael Kovac/Getty At the end of the night, Thicke got onto the mic and addressed the crowd, saying “Let’s get the party started … it’s here on the dance floor. Let’s get the cops called!” Two minutes later, the “Blurred Lines” singer got his wish and the party was shut down by police. Michael Kovac/Getty Michael Kovac/Getty Other famous faces at the party included hosts Rande Gerber and Cindy Crawford (dressed along with their kids Kaia and Presley as the Sex Pistols), Hilary Duff and her new boyfriend Jason Walsh (the couple matched in a pilgrim and Native American chief costume), Nina Dobrev (dressed as the bear from DiCaprio’s The Revenant), Sascha Baron Cohen and Isla Fisher and James Corden and his wife. RELATED VIDEO: Tobey Maguire and Wife Jennifer Meyer Split After 9 Years of Marriage Zach Braff looked like he had been plucked from the set of Top Gun, and Ryan Lochte and his fiancée Kayla Rae Reid added some whimsy to the event with their Alice in Wonderland-inspired costumes. Michael Kovac/Getty Michael Kovac/Getty Jenna Dewan-Tatum (dressed as a sparkly unicorn) and Lauren Conrad left their husbands at home for the night and partied with their respective group of gal pals.