Hollywood's social scene was hopping this past weekend as celebrities hit several Halloween parties in their 2018 costumes.

Among the notable events was a bash thrown by Casamigos Tequila and had appearances by the original co-founders of the brand, George Clooney, Rande Gerber and Mike Meldman. (It was launched in 2013 and sold to Diageo for $1 billion in 2017.)

The Casamigos party was conducted in Las Vegas, and Clooney and Gerber appeared as airplane co-captains with Gerber's wife, model Cindy Crawford, as a flight attendant serving Casamigos drinks.

There were other celeb-packed parties across the U.S., including the 7th Annual Just Jared Halloween Party sponsored by Carl's Jr. Just Jared is a celebrity and entertainment news website.

Click here to see photos from these parties and others, showing celebrities in their Halloween costumes.