<Li> Arliss Howard as Peter Ludlow, InGen's current CEO and Hammond's conniving and greedy nephew . He is the main antagonist of the film . </Li> <Li> Richard Attenborough as John Hammond, InGen's former CEO and the park's original visionary . </Li> <Li> Vince Vaughn as Nick Van Owen, a well - traveled and experienced documentarian and environmentalist . </Li> <Li> Vanessa Lee Chester as Kelly Curtis, Ian's teenage daughter from a failed relationship . </Li>

Who did vince vaughn play in jurassic park