The Universal studio has not revealed the details of the character to be played by the 77-year-old actor yet, reported Variety.
Cromwell will team up with Chris Pratt and Bryce Dallas Howard, who reprise their roles, along with Toby Jones and Justice Smith.
The shooting of the film begins next month with director J A Bayona.
"Jurassic World" helmer Colin Trevorrow has penned the script along with Derek Connolly.
The untitled project is slated for release on June 22, 2018.
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