We're told the three hit up XS Nightclub inside the Wynn on Friday.
Diplo had a DJ set, Miley's in town for iHeartRadio Music Festival and Van Der Beek is actually playing Diplo in a new mockumentary airing on Viceland.
The group got V.I.P. bottle service stage side; Coronas and Babe Rosé champagne all night long.
Miley shared video from inside the club, it definitely looked like the place to be!