Chris Pratt sings backup vocals for Jimmy Buffett

Jimmy Buffett and Chris Pratt sang a rendition of "Margaritaville" at the Jurassic World premier party Tuesday night.

In the spirit of celebration, Buffett invited the actor on stage to perform goofy backup vocals, which led to spontaneous shout outs to co-star Bryce Dallas Howard and his mom. The party reminded one of a theme park, and rightly so, complete with virtual reality areas and displays of mysterious dinosaur eggs, USA Today reports.

The Jurassic World premier in Hollywood started earlier Tuesday night on the red carpet where Pratt and co-stars like Bryce Dallas Howard and Colin Trevorrow posed before the classic Jurassic Park franchise logo.