The cast of the 1999 movie Big Daddy is led by Adam Sandler, with key roles played by Joey Lauren Adams, Jon Stewart, and the Sprouse twins as the child Julian.

Main cast

  • Adam Sandler as Sonny Koufax, an unmotivated law school graduate who suddenly ends up caring for a young boy.
  • Joey Lauren Adams as Layla Maloney, a lawyer who becomes Sonny’s love interest.
  • Jon Stewart as Kevin Gerrity, Sonny’s successful lawyer roommate and Julian’s biological father.
  • Cole and Dylan Sprouse jointly as Julian “Frankenstein” McGrath, the little boy Sonny looks after.

Important supporting cast

  • Leslie Mann as Corinne Maloney, Layla’s sister who disapproves of Sonny.
  • Rob Schneider as Nazo, the eccentric delivery guy who is one of Sonny’s friends.
  • Allen Covert as Phil D’Amato, Sonny’s friend who works as a lawyer.
  • Josh Mostel as Arthur Brooks, the social worker involved with Julian’s case.

Other notable roles

  • Kristy Swanson as Vanessa, Sonny’s girlfriend at the start of the film.
  • Joseph Bologna as Lenny Koufax, Sonny’s strict but caring father.
  • Peter Dante as Tommy Grayton and Jonathan Loughran as Mike, Sonny’s friends.
  • Steve Buscemi as the unnamed homeless man who appears repeatedly for comic moments.
  • Tim Herlihy as the man in the Kangaroo Song costume (Singing Kangaroo).

Information gathered from public data available on the internet and portrayed here.