Credit: @AlexSanderNYC Photo: Maks, Val and Alex as The Three Musketeers

All for one, and one for hot Halloween costumes!

Dancing With the Stars pro bros Val Chmerkovskiy and Maksim Chmerkovskiy were out in full force on Friday (October 25), dressing as two of The Three Musketeers at the Casamigos Tequila Halloween party in Beverly Hills.

The third Musketeer is their ginger buddy Alexander (@AlexSanderNYC), who shared some great pics. (See more from the group below.) Do you think they borrowed those costumes from the DWTS wardrobe department? Every Monday night is Halloween on this show.

The guys seemed to mostly pose with each other, but Celebuzz has a photo of Maks’ girlfriend, model Kate Upton, who was reportedly also at the party.

Pretty much everyone in Hollywood was there, including Derek Hough and his sister, former DWTS pro Julianne Hough (who caused a bit of a stir with her costume). Also in the house: Julianne’s ex Ryan Seacrest, John Stamos, Tim Allen, Chelsea Handler, Larry David, DWTS alum Elisabetta Canalis, and many more.

Casamigos was founded by Rande Gerber and Elisabetta’s ex, George Clooney, but Clooney was not there himself. Rande was there, though — he went as Axl Rose and his wife Cindy Crawford was Slash!

Check out more photos from the party here. Some of the stars got creative, and others just showed up as themselves. (We’re disappointed, Aziz Ansari!) The Musketeers were clearly the hottest, though.

Sources: Instagram, Gossip Cop, Celebuzz