The New Zealander is returning to the franchise as palaeontologist Dr Alan Grant for the first time since 2001 film Jurassic Park III.
He’ll co-star alongside original Jurassic Park actors Laura Dern and Jeff Goldblum.
The film is resuming production having been delayed due to the coronavirus pandemic, and to mark the occasion, Neill told his Twitter followers that he thinks the new film is the “best yet”.
“Hold onto your hat,” Neill wrote. “Gettin’ my old one back on this week, and facing off dinosaurs once again. Best yet.”
He added: “Excited and terrified- these things will kill ya.”
It’s unknown how his character will re-enter the franchise, ut neill as confirmed that his appearance will be more than the cameo Goldblum had in Jurassic World: Fallen Kingdom.
The new sequel, directed by Colin Trevorrow, stars Chris Pratt, Bryce Dallas Howard and Justice Smith.
Jurassic World: Dominion is set ot be released i cinema son 11 June, 2021 – find the full list of every release date that has been delayed because of coronavirus here.