Chris Pratt sings backup vocals for Jimmy Buffett at 'Jurassic World' premier party

HOLLYWOOD, June 10 (UPI) -- 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.

@prattprattpratt, #ColinTrevorrow, & #BryceDallasHoward cooked up something good in that lab. #JurassicWorldPremiere #JurassicWorld #TheParkIsOpen

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A photo posted by Jurassic World (@jurassicworld) on Jun 9, 2015 at 8:04pm PDT

Oh, hi! Chris Pratt just joined Jimmy Buffett onstage at the #JurassicWorldPremiere party. #margaritaville

A video posted by @thatgirlcarly on Jun 9, 2015 at 11:22pm PDT

Virtual reality Dinos! #jurassicworldpremiere pic.twitter.com/6A0SRqeHV3

— Carly Mallenbaum (@ThatGirlCarly) June 10, 2015

Jurassic World opens in theaters this weekend on June 12.