Luke Bryan brought out a very special guest during his show at Jones Beach Theater in Wantagh, NY.... Morgan Wallen!

Bryan and Wallen performed Wallen's hit, "Whiskey Glasses." The crowd went wild for the special guest and surprise collaboration, screaming along to every line fo the song, which had Wallen and Bryan both smiling ear-to-ear.

After the performance, Wallen posted a picture of the collaboration on his Instagram and wrote, "Never turned down a party with my boy Luke Bryan."

Bryan also thanked Wallen, as well as  Dylan Scott, fhis Instagram—Scott also delighted the crowd that night with a collaboration alongside Bryan during the show.

This wasn't the first time Bryan and Wallen have collaborated. The duo performed Wallen's hit "Up, Down" on two occasions. Bryan was seen singing along to the chorus and Florida Georgia Line's parts in the song, first at Bryan's own Kansas City concert in 2018. (Bryan even messed up a couple of lyrics.) Wallen then joined Bryan at his 32 Bridge Bar during that year's annual Country Radio Seminar to perform the song once again.

Wallen is currently performing at numerous summer music festivals while also on Florida Georgia Line's Can't Say I Aint Country Tour. Other support acts on select dates of the tour include Dan + Shay, Canaan Smith, and Hardy.

Bryan is currently on his Sunset Repeat Tour featuring support from Cole Swindell and Jon Langston. The tour goes through October with off dates for Bryan to go on his Farm Tour with Swindell, Mitchell Tenpenny, the Peach Pickers, and DJ Rock.

Watch Morgan Wallen's RISERS Performance of "Whiskey Glasses"

Behind the Scenes of RISERS With Morgan Wallen: