Big Daddy is a 1999 American comedy-drama film directed by Dennis Dugan, written by Steve Franks, Tim Herlihy, and Adam Sandler from a story conceived by Franks, and produced by Sid Ganis and Jack Giarraputo. The film stars Sandler, Joey Lauren Adams, Jon Stewart, Rob Schneider, Dylan Sprouse, Cole Sprouse, and Leslie Mann, with Allen Covert and Josh Mostel in supporting roles. The plot follows a 32-year-old man who gets dumped by his girlfriend for not accepting responsibility and then tries to be responsible by adopting a five-year-old boy who appears on his doorstep.

Steve Franks is an American screenwriter, director and musician based in Orange County, California. He is best known as the creator of the USA Network original series Psych.