Jurassic World was a bigger hit than anyone expected last year when it ended up grossing a massive $1.6 billion worldwide, a figure which made it one of the biggest movies of all-time.

A sequel being given the green light almost immediately was less of a surprise, but with Colin Trevorrow busy preparing for Star Wars Episode IX, a new filmmaker was found to take the helm in the form of J.A. Bayona (Trevorrow has however penned the script with Derek Connolly). Now, some pretty significant casting additions have been made to the sequel.

According to Variety, Toby Jones (Captain America: The First Avenger) and Rafe Spall (Prometheus) will join returning stars Chris Pratt and Bryce Dallas Howard in Jurassic World 2, while producers are already preparing to cast two other key roles now they’ve found this duo. Unfortunately, just like the sequel’s plot, who they’ll play is currently a mystery.

Jones will next be seen in The Coldest City and The Snowman, while Spall stars in the third season of Black Mirror on Netflix. Both actors are no doubt impressive additions, though who else from the first movie will join them is currently unclear. Jake Johnson recently said that he won’t be back, so there’s one actor we can tick off the list for the time being anyway.